Best PR Agency UK 2026
Leading AI & Tech Startup PR Agency UK 2026
The AI revolution is reshaping every industry, and the companies building it need more than a generic press release to stand out. From seed-stage machine learning startups to Series B SaaS platforms, the race for media visibility, investor trust, and market authority has never been fiercer.
At unitedpress.uk, we are a specialist AI & Tech Startup PR Agency that helps founders, CTOs, and marketing leaders secure earned media coverage across tier-one publications. We craft tailored narratives that position your technology as essential, your leadership as visionary, and your brand as investment-ready.
Whether you are launching a new product, raising capital, or entering a competitive market, our London-based PR agency helps AI and tech startups build lasting credibility.
What Does an AI & Tech Startup PR Agency Actually Do?
Unlike traditional PR firms, an AI & tech startup PR agency understands the unique challenges technology founders face—complex products, sceptical investors, fast-moving markets, and the need to translate deep technical innovation into compelling stories.
At unitedpress.uk, we specialise in turning technical complexity into mainstream media coverage. Our team works with:
- Early-stage AI and machine learning startups seeking major press features
- SaaS companies scaling internationally and building credibility in new markets
- Deep tech ventures in computer vision, NLP, robotics, and automation
- Venture-backed platforms preparing for Series A, B, or IPO-level visibility
- AI-powered healthtech, fintech, edtech, and enterprise software companies
- Open-source AI projects looking to build community and developer mindshare
A dedicated tech PR agency like ours combines editorial strategy, journalist relationships, and deep sector knowledge to place your story where it matters most.
Why AI & Tech Startups Need Specialist PR in 2026
The AI market in 2026 is defined by intense competition, increasing regulation, and a flood of new entrants claiming to be “AI-powered.” In this environment, the startups that win are the ones with trusted, visible brands—not just the best algorithms.
Investors now conduct deep due diligence on media presence before writing cheques. Enterprise buyers Google your company before signing contracts. Talented engineers choose employers with strong reputations. A strategic PR campaign for tech entrepreneurs helps you:
- Build instant trust with investors, partners, and customers through third-party validation
- Differentiate your startup in a crowded AI landscape where hundreds claim similar capabilities
- Control the narrative around your technology before competitors or critics define it for you
- Accelerate fundraising by demonstrating market traction and thought leadership
A trusted PR agency for startups like unitedpress.uk helps you cut through the noise with coverage that matters.
Guaranteed Publicity Across Global Media Platforms
One of the most powerful advantages of working with unitedpress.uk is our guaranteed media placement model. Unlike agencies that promise “pitching” with no guaranteed results, we commit to securing your coverage on internationally respected publications.
Through our established editorial network, we place AI and tech startup stories on platforms including:
Forbes · Business Insider · Yahoo Finance · Fast Company · Entrepreneur · TechCrunch · VentureBeat · Inc Magazine · Bloomberg · The Guardian
These placements are read by venture capitalists, CTOs, enterprise buyers, and the tech journalists who shape industry opinion—making them the ideal launchpad for AI startups seeking credibility at scale.
🌍 Featured Global Media Platforms
Get on Forbes
Being featured on Forbes instantly positions your AI startup as a market leader. Forbes reaches over 150 million monthly readers including investors, C-suite executives, and technology decision-makers. A Forbes feature gives your company the third-party endorsement that accelerates fundraising conversations and enterprise sales cycles. Our editorial team crafts contributor-quality narratives that meet Forbes’ rigorous standards while highlighting your unique value proposition.
Get on Bloomberg
Bloomberg is the definitive voice in financial and technology news, reaching the institutional investors and analysts who drive capital allocation. For AI startups approaching Series A and beyond, Bloomberg coverage signals financial credibility and market maturity. We secure placements that frame your technology within the broader investment landscape, helping you attract the attention of fund managers, LP networks, and strategic acquirers actively scanning for AI opportunities.
Get on Yahoo Finance
With over one billion monthly visitors, Yahoo Finance is one of the most widely read financial platforms globally. Coverage here reaches retail and institutional investors alike, boosting your startup’s visibility across search engines and news aggregators. Our placements on Yahoo Finance are syndicated across partner networks, multiplying your reach and creating a lasting digital footprint that supports SEO, investor outreach, and market positioning for years to come.
Core Services Offered by Our AI & Tech Startup PR Agency
Our AI & tech startup PR services are designed to deliver measurable outcomes—not vanity metrics. Every campaign is built around your growth stage, target audience, and commercial objectives. We provide end-to-end press release distribution, strategic media outreach, and thought leadership development specifically for technology companies.
Here is a detailed breakdown of the services we offer and how each one drives real business results for AI startups:
1. AI & Tech Press Release Distribution & Editorial Placement
We write and distribute press releases that actually get published—not buried in wire service archives. Every release is crafted by tech-specialist editors who understand AI terminology, investor language, and what journalists look for in a story.
At unitedpress.uk, our press releases are supported by:
- Custom editorial strategy tailored to your funding stage and target audience
- Direct journalist pitching to technology, business, and vertical-specific reporters
- Guaranteed placements on high-authority platforms with real editorial oversight
- SEO-optimised distribution that builds permanent backlinks to your domain
Our releases typically cover:
- Product launches, feature announcements, and platform updates
- Funding round announcements (pre-seed through Series C+)
- Strategic partnerships, integrations, and enterprise customer wins
- Research publications, benchmark results, and industry reports
- Executive hires, board appointments, and company milestones
Our 5-Step AI & Tech PR Process
Step 1: Project Discovery & Market Assessment
We begin by understanding your AI technology project, product model, business goals, and target market. At unitedpress.uk, we assess: Project credibility and readiness Competitive AI and tech market landscape Regulatory and compliance considerations Investor and media positioning opportunities This ensures every PR campaign is strategic, compliant, and market-aligned.
Step 2: PR Strategy & Narrative Development
Once the foundation is clear, we craft a clear and credible brand narrative. We help SaaSne: Core messaging and value proposition Product or platform positioning Founder and leadership story Long-term PR and thought leadership angles This step ensures your message is consistent, understandable, and trust-driven.
Step 3: Content Creation & Press Release Execution
Our team develops high-quality, media-ready content designed for authority platforms. This includes: AI & Tech press releases Editorial articles and features Founder interviews and expert insights Compliance-friendly announcements All content is built to meet journalistic standards, not promotional hype.
Step 4: Media Outreach, Placement & Guaranteed Publicity
We execute targeted media outreach and placement across AI & tech and mainstream platforms. Through unitedpress.uk, projects gain visibility on: Global tech media Financial and business publications Technology platforms Mainstream global outlets This step delivers credible third-party validation, not just exposure.
Step 5: Ongoing PR, Reputation Management & Growth Support
PR does not stop after one campaign. We support long-term growth through: Continuous media coverage Reputation and crisis monitoring Thought leadership expansion Market positioning and authority building This ensures your brand grows with trust, consistency, and market leadership.
2. Guaranteed Media Placement on Tier-One Publications
Visibility on trusted media platforms is a business asset, not a luxury. We guarantee placements across globally respected outlets including Forbes, Business Insider, TechCrunch, Yahoo Finance, and more.
Through unitedpress.uk, your AI startup gains access to:
- Editorial placements on publications with domain authority above 80
- Permanent, indexed articles that strengthen your SEO profile indefinitely
- Coverage that appears in Google News, Apple News, and social media feeds
- Brand association with the world’s most trusted media brands
This level of exposure reaches investors, enterprise decision-makers, partners, and global audiences—not just niche tech readers.
Why Guaranteed Media Coverage Matters for AI Startups
| Coverage Advantage | Impact on Your AI Startup |
|---|---|
| Instant Brand Credibility | Association with Forbes, Bloomberg, or TechCrunch signals legitimacy to investors and customers |
| Investor & Partner Confidence | Media coverage reduces perceived risk and accelerates due diligence conversations |
| SEO Authority | High-DA backlinks from major publications permanently boost your search rankings |
| Talent Acquisition | Top engineers and researchers join companies with visible, respected brands |
Who Should Partner with an AI & Tech Startup PR Agency?
Our AI & tech startup PR services are built for companies at every growth stage who understand that strategic communication is a competitive advantage, not an afterthought.
You should consider working with us if you are:
- An AI startup founder preparing to launch a product and needing media coverage to build initial market credibility
- A Series A-C company seeking to raise your next round and needing a strong media presence to impress investors
- A SaaS platform entering new international markets and needing trusted publication features to establish authority
- A deep tech company in areas like autonomous systems, NLP, or computer vision needing help translating complex technology into compelling narratives
- A VC-backed venture wanting to maintain consistent visibility between funding rounds and product milestones
- An AI entrepreneur building a personal brand as a thought leader alongside your company’s growth
Why Choose unitedpress.uk As Your AI & Tech PR Partner?
We are not a generalist agency trying to learn your industry on the job. Our team has worked exclusively with technology companies since our founding—AI startups, SaaS platforms, fintech ventures, and deep tech innovators. We understand the difference between supervised and unsupervised learning, why LLM benchmarks matter to investors, and how to frame a technical moat in language that resonates with mainstream journalists.
Every AI startup operates in a different market context with unique positioning challenges. We never use templated approaches. Each campaign begins with a deep strategy session to identify your competitive differentiators, target publications, key narratives, and measurable objectives. Whether you are positioning a computer vision startup or an enterprise AI platform, we build bespoke media strategies that drive real business outcomes.
We target the publications that your investors, customers, and partners actually read. Our media outreach covers: technology and AI-specific outlets (TechCrunch, VentureBeat, Wired, The Verge), business and finance publications (Forbes, Business Insider, Bloomberg), mainstream national media (The Guardian, BBC, USA Today), and vertical industry publications in healthcare, finance, education, and enterprise software.
We report on what matters: publication authority scores, referral traffic generated, backlink quality, social amplification, and downstream business impact. You receive monthly reports showing exactly which placements were secured, their estimated reach, and how they contribute to your SEO profile. We measure success by whether our work moves the needle on fundraising, sales pipeline, and brand recognition—not by counting press release sends.
AI startups operate on compressed timelines. Your market window, runway, and competitive position demand a PR partner who moves fast. Our editorial team can produce publication-ready content within 48 hours, and our journalist relationships allow us to secure placements on accelerated timelines when news is time-sensitive. From product launches to crisis response, we match the pace of the technology industry.
Global News, Guaranteed
Real-World Results:
How We Help AI & Tech Startups Win Media Coverage
1. Launching an AI-Powered Analytics Platform into the Global Market
A UK-based machine learning startup approached us three weeks before launching their enterprise analytics platform. They had strong technology but zero media presence. We developed a narrative around their unique approach to real-time data processing, secured pre-launch interviews with key tech journalists, and coordinated an embargoed press strategy.
Result: 12 tier-one media placements within the first week of launch, including features on Forbes, TechCrunch, and Business Insider. The coverage directly contributed to closing their Series A round within 60 days of launch.
2. Building Investor Confidence for a Computer Vision Startup
A computer vision startup specialising in autonomous warehouse robotics needed to raise their profile ahead of a £15M Series B round. Investors were interested in the technology but concerned about market validation. We positioned the CEO as a thought leader through byline articles in Bloomberg and Fast Company, and secured product coverage in vertical logistics publications.
Result: The Series B closed oversubscribed. The lead investor cited the company’s “impressive media presence and thought leadership positioning” as a key factor in their investment decision.
3. Helping a SaaS AI Platform Establish Trust Across New Markets
An AI-powered HR technology platform was expanding from the US to the UK and European markets. They needed credibility with enterprise buyers who had never heard of them. We developed a UK-specific media strategy targeting HR trade publications, business media, and technology outlets, combined with a strategic guest posting campaign positioning their leadership team as experts in AI-driven workforce management.
Result: Within 90 days, the company had secured coverage across 18 UK and European publications, established partnerships with two FTSE 250 companies, and built a permanent SEO backlink profile supporting their UK domain authority.
AI & Tech PR vs Traditional PR: Why Specialist Expertise Matters
Most generalist PR agencies lack the technical knowledge to represent AI startups effectively. They struggle with terminology, miss the nuances of your market, and pitch journalists who cover the wrong beat. Here is how a specialist AI & tech PR agency compares:
| Feature | Traditional PR Agency | unitedpress.uk (AI Specialist) |
|---|---|---|
| Technical Understanding | Generic business knowledge | Deep AI, ML, and SaaS expertise |
| Media Relationships | Lifestyle, consumer, local media | Tech journalists, VC-focused outlets, enterprise media |
| Content Quality | Template-based press releases | Custom editorial crafted by tech-specialist writers |
| Placement Guarantee | No guarantees, “best effort” pitching | Guaranteed placements on tier-one publications |
| SEO Impact | Minimal, wire-service distribution | High-DA backlinks that permanently boost rankings |
| Investor Relevance | Consumer-facing coverage | Coverage read by VCs, angels, and institutional investors |
Choosing a specialist agency means every pound you invest goes towards coverage that drives business outcomes. Our journalist network, editorial expertise, and understanding of the AI investment landscape ensure your story lands in front of the people who matter most to your growth.
What Makes unitedpress.uk Different?
We combine guaranteed media placements, AI-sector expertise, and data-driven reporting to deliver PR campaigns that directly support your fundraising, sales, and brand-building objectives. Every engagement is bespoke—built around your technology, market, and growth stage.
Our Media Outreach Approach
We target publications across four strategic tiers: AI-specific outlets, business and finance media, mainstream national press, and vertical industry publications. This multi-channel approach ensures maximum visibility with the audiences that drive your business forward.
Precision Targeting That Delivers
Every pitch is tailored to the individual journalist, publication, and news cycle. We do not send mass emails. Our precision targeting approach delivers placement rates that far exceed industry averages, ensuring your budget delivers measurable ROI.
Multi-Channel PR Strategy for AI Companies
Effective AI startup PR requires a coordinated multi-channel approach. We do not rely on a single media outlet or strategy. Instead, we build integrated campaigns that place your brand across every channel your stakeholders use to discover, evaluate, and trust technology companies.
| Channel | Strategic Impact |
|---|---|
| Tier-One Media Platforms | Builds authority and trust through association with globally respected publications |
| Search Engine Optimisation | High-DA backlinks from media coverage permanently strengthen your organic rankings |
| Social Media Amplification | Curated content distribution across LinkedIn, X, and industry communities |
| Investor-Facing Communications | Targeted narratives for fund managers, angels, and strategic acquirers |
| Thought Leadership | Byline articles and expert commentary that position your team as industry authorities |
Precision Media Outreach That Delivers Results
Spray-and-pray PR is dead. We use a precision targeting methodology that identifies the specific journalists, editors, and contributors most likely to cover your story. Our outreach is informed by real-time editorial calendars, journalist beat analysis, and publication-specific formatting requirements.
| Target Audience | Why Strategic Media Coverage Matters |
|---|---|
| Venture Capital Investors | Coverage in Forbes, Bloomberg, and TechCrunch signals market validation and reduces perceived risk |
| Enterprise Buyers | Features in business media build the trust required for six and seven-figure procurement decisions |
| Strategic Partners | Visibility in industry publications opens doors to integration, distribution, and co-development partnerships |
| Technical Talent | Engineers and researchers choose employers with visible, respected industry positions |
Thought Leadership & Brand Authority for AI Founders
1. What does an AI & Tech Startup PR Agency do?
In a crowded AI market where hundreds of startups claim similar capabilities, thought leadership is what separates the companies that attract investment, talent, and partnerships from those that remain invisible. Our agency positions your founders and technical leaders as trusted voices through byline articles in publications like Forbes, speaking opportunity placement, podcast guest coordination, and expert commentary for breaking AI news stories.
2. How is an AI & Tech Startup PR Agency different from a traditional PR agency?
We develop comprehensive thought leadership programmes that include regular byline contributions to top-tier publications, speaker placement at industry conferences (Web Summit, CES, AI World Congress), LinkedIn content strategy for your C-suite, and expert commentary for journalists covering AI regulation, ethics, and market developments. Every piece of content reinforces your positioning as a market authority.
3. When should a AI technology project hire an AI & Tech PR agency?
Our approach goes beyond simple media outreach. We create editorial calendars aligned with your product roadmap and industry news cycles, ensuring your leadership team has a consistent, visible presence in the publications that matter. We also provide media training for technical founders who need support translating complex innovations into compelling soundbites.
4. Can AI & Tech PR help with investor confidence and fundraising?
The AI industry moves fast, and reputation risks are real—from data privacy concerns to algorithmic bias allegations. Our crisis communication services include 24-hour media monitoring, pre-prepared holding statements, rapid-response journalist outreach, and strategic narrative reframing. We help AI companies navigate sensitive topics while protecting brand equity and stakeholder confidence.
5. Do you provide guaranteed media placements?
We provide proactive reputation management including ongoing sentiment monitoring, competitor media analysis, and pre-emptive narrative development. When regulatory changes, competitor attacks, or market shifts threaten your positioning, our team responds within hours—not days. We also help prepare AI startups for the inevitable scrutiny that comes with growth, ensuring your messaging framework can withstand critical examination from journalists, regulators, and the public.
6. Is AI & Tech PR useful for established projects or only new launches?
Every crisis is also an opportunity. We help AI companies turn challenging moments into demonstrations of leadership, transparency, and commitment to responsible innovation. Our crisis playbooks are developed in advance and tailored to the specific risks facing your business, from data breaches to ethical AI controversies.
How We Measure PR Success for AI Startups
Vanity metrics mean nothing if they don’t translate into business results. At unitedpress.uk, we measure every campaign against outcomes that matter to AI startup founders and their investors. Our reporting framework tracks: publication domain authority and estimated readership, referral traffic from media placements to your website, backlink quality and its impact on search rankings, social media amplification and engagement metrics, and downstream business impact including investor enquiries, demo requests, and partnership conversations.
We provide monthly strategy reviews where we assess campaign performance, adjust targeting based on results, and identify emerging media opportunities aligned with your product roadmap. Learn more about how we measure success.
Ready to Build Your AI Startup's Media Presence?
The AI startups that dominate their markets in 2027 are the ones building media authority today. Whether you are pre-seed and seeking your first press feature, or Series B and preparing for global expansion, unitedpress.uk has the specialist expertise, journalist relationships, and guaranteed placement model to accelerate your growth.
Schedule a free strategy call with our AI & tech PR team to discuss your goals, or email us directly to get started.
AI & tech PR is not about chasing headlines—it is about building the kind of sustained media presence that drives investor confidence, customer trust, and market leadership. A professional AI & tech startup PR agency places your brand where credibility matters most, across both technology-specific and mainstream media, positioning your company as reliable, innovative, and future-ready.
What Strategic AI & Tech PR Delivers:
- Credibility in competitive, fast-moving AI markets
- Investor confidence through visible market validation and third-party endorsement
- Media authority alongside recognised industry leaders and established tech companies
- Thought leadership that extends beyond product promotion into genuine industry influence
- Long-term competitive advantage through permanent, high-authority media placements
In 2026, the most successful AI companies are built on reputation, authority, and strategic communication—not just technology.
Start Building Your AI Startup's Reputation Today
Every day without strategic PR is a day your competitors are building the media presence and investor credibility that should be yours. unitedpress.uk is the specialist AI & tech startup PR agency trusted by founders across the UK, US, and globally to deliver guaranteed media coverage that drives real business outcomes.
Book your free consultation | Email our team | Start a live chat
AI and tech startup PR in Britain: getting past the reporters who see every deck
The British startup press is small, well informed and permanently short of time. Sifted, backed by the Financial Times, covers European startups for an audience of founders and investors. UKTN, which launched in 2012 as Tech City News, reports on the UK ecosystem specifically. TechCrunch, founded in 2005 and owned by the investment firm Regent since March 2025, remains the title most founders name first and the hardest of the three to reach. Underneath them sit the sources these journalists check: Beauhurst equity records, Companies House filings, the legacy Tech Nation data now under Founders Forum Group ownership, and the policy output of DSIT and the AI Security Institute, renamed from the AI Safety Institute in February 2025. Every one of those sources will be consulted before your claim is printed.
The raise is only the peg
Funding rounds are the most reported and least differentiated news in the ecosystem. Amount, lead investor and headcount plans get you into a roundup. Getting a standalone piece requires something else: a technical decision worth explaining, a market nobody else is serving, a customer with results, or a founder prepared to say something specific about their sector.
AI claims are checked now
The period when describing a product as AI-powered was sufficient ended some time ago. Reporters ask what model, trained on what, evaluated how, and what happens when it is wrong. If the answer is a wrapper around a third-party model with prompt engineering on top, say so plainly. Founders who overstate get corrected in print, and it follows them.
Filings will be checked
Companies House holds your accounts, your directors and your share allotments, and British technology journalists read them routinely. Beauhurst records equity rounds independently of what you announce. If your stated raise, valuation or team size does not match what is filed, expect the discrepancy to appear in the article rather than in a polite email asking about it.
Regional stories are underserved
London absorbs most ecosystem coverage, which makes the alternative genuinely valuable. A company building in Manchester, Bristol, Edinburgh, Belfast, Cardiff or the North East has a story about where technical talent lives, why it stayed and what a cluster outside the capital costs to run. Regional angles reach both the national tech press and a well-read local business media.
Policy is a live beat
UK technology policy is moving quickly, from AI assurance and procurement rules to compute investment and immigration routes for technical staff. Founders with direct operational experience of a policy, rather than opinions about it, are useful to journalists covering DSIT announcements and select committee work. Being useful once is how founders become a reporter's regular call.
Read the desk before pitching it
Sifted writes for people building and funding companies, with a European frame and a taste for analysis. UKTN covers the British ecosystem in more granular news form. TechCrunch is global, competitive and interested in scale. The same announcement needs three different first paragraphs, and sending one to all three marks you as somebody who has not read any of them.
What British startup journalists commission
Ecosystem coverage looks broad from outside and narrow from within. These are the recurring formats, and each has a different threshold a startup needs to clear to reach it.
- Funding coverage across pre-seed to growth stage, including who led, who followed, valuation where disclosed and what the round says about the wider market
- Company building and operational stories on hiring, remote structures, pricing changes, pivots, cash discipline and the mistakes founders will admit to
- Technical explainers on model architecture, deployment costs, evaluation methods, data provenance and the limits of what a system can actually do
- Investor and market analysis, drawing on deal data from sources such as Beauhurst and on the legacy Tech Nation research the sector still references
- Policy and regulation reporting covering DSIT initiatives, AI assurance and safety work, procurement, R and D tax relief and visa routes for technical hires
- Failure and difficulty stories, including down rounds, shutdowns, redundancies and disputes, which are read more widely than the launch coverage founders chase
Why founder pitches disappear without reply
Startup reporters receive hundreds of approaches weekly and answer a handful. The pitches that fail nearly always share the same construction problems, which is good news because each one is avoidable.
- A mission statement instead of news. Building the future of anything is not an event. Something has to have happened: a raise closed, a product shipped, a customer live, a finding published.
- AI as an adjective. Saying a product is AI-driven without naming what it does, what it replaces and how it is evaluated reads as positioning. Reporters have learned to ask, and the follow-up is where most pitches end.
- Numbers that contradict the filings. Claimed team sizes, revenue or valuations that do not match Companies House are the fastest way to lose a journalist permanently. They check, and they talk to each other.
- A stealth company that will not explain itself. Requesting coverage while refusing to say what the product does, who uses it or who invested wastes a reporter's afternoon and guarantees the next email is ignored.
- Embargo breaks and simultaneous exclusives. Offering the same exclusive to two outlets, or briefing a newsletter before the agreed time, ends relationships across a small ecosystem in a single afternoon.
Not sure which of these applies to your story? Send it to ceo@unitedpress.uk and we will tell you straight.
What UK startup founders ask about media
When is a startup ready for press coverage?
When something verifiable has happened that a reader outside your company would find interesting. Usually that is a funded round, a shipped product with real users, a hire that signals ambition, or evidence about your market that nobody else holds. Pursuing coverage before any of that produces either silence or a thin piece that sets an unhelpful baseline for everything after it.
Is TechCrunch still worth chasing from the UK?
It is worth pursuing when the story is genuinely competitive at an international level, and worth deprioritising when it is not. UK-based coverage in Sifted or UKTN frequently does more commercial work for a British company, because it reaches domestic investors, customers and technical hires directly. Founders often over-index on the best-known masthead at the expense of outlets their actual buyers read.
Should we announce a funding round exclusively?
Usually yes, to one outlet, with a firm time and no simultaneous offers. Exclusivity buys depth and a better position on the page, and British technology reporters expect it for a substantial round. Offer a clear deadline so you can move on if the answer is no, and never run the same exclusive with two publications. That gets discovered quickly in a small press corps.
How much technical detail should a founder give a journalist?
More than feels comfortable. Reporters covering AI are increasingly technically literate and are testing whether you understand your own system. Explaining what you built, what you bought, where it fails and how you measure it builds credibility that marketing language destroys. If something genuinely cannot be disclosed, say that directly rather than answering vaguely.
Which UK data sources will journalists accept from a startup?
Companies House filings, Beauhurst deal records, published government statistics, and independent research with a stated method all hold up. Investor-supplied data can work if the source is named. Internal metrics such as user growth or retention need the period and the denominator stated, otherwise they will be attributed to you as a claim rather than reported as a fact.