Your code did the R&D.
We build the proof.
You may be owed money for work you’ve already shipped. Aven builds the evidence that claims it.
Free · read-only · not tax advice
GitHub, GitLab and Linear live today · more rolling out · or we work from an export
At Aven, we don't write your R&D story - we assemble the proof of it. Every claim line in the pack traces back to a commit, PR or ticket your team already wrote.
Read-only by design. We read commit, PR and ticket text - never your source code, and secrets are redacted at ingestion.
There’s money in your repo.~£160k
The average claim
UK companies claimed £7.6bn of R&D relief in 2023-24 - roughly £160,000 per claim - and plenty of qualifying software work still goes unclaimed.
The climate your claim files into, in numbers
R&D relief claimed from HMRC in 2023-24
R&D claims made across the UK that year
of claims HMRC compliance-checked in 2023-24
of SME claims held error or fraud at the 2020-22 peak
Source: HMRC R&D Tax Credits Statistics (September 2025) and HMRC’s approach to R&D tax reliefs 2023-24, GOV.UK. Not tax advice.
Signal review
reviewingIllustrative
Does your engineering count as R&D?
The strongest claims come from genuine technical uncertainty - problems a skilled engineer can’t readily solve from known approaches.
Scale & performance
Reliability or speed under hard constraints.
Algorithms & data
Novel algorithms, ML/AI, data or distributed systems.
Hard integrations
Real experimentation, not routine setup.
Platform & security
Infrastructure work with technical uncertainty.
What could your work be worth?
Move the sliders for a deliberately low-balled range - not a quote or tax advice, just a reason to check properly.
Aven does not determine your liability, select your scheme, or guarantee any amount - that’s your tax firm’s role. Final figures depend on an expert’s review.
Based on £260,000 of indicative qualifying staff cost and Aven’s conservative post-2024 merged-scheme range. Your tax firm selects the scheme and determines the final claim. It is not a quote.
Take a tour of the pack.
Defensible, not maximised: a PDF evidence pack and CSV cost model, built to survive an HMRC enquiry - every claim line traces back to work your team already shipped.
R&D evidence pack
Meridian Freight Systems Ltd
Accounting period 2024-04-01 to 2025-03-31
01·The pack
Scheme-determining data assembled for your adviser - Aven never selects your scheme.
Illustrative
02·At a glance
The team sought to reduce p99 write latency below 40 ms under non-idempotent retries - an advance an expert could not readily deduce.
Illustrative
03·Qualifying projects
- Staff (apportioned)
- £312,000
- Subcontractors (65%)
- £41,600
- Cloud & data
- £28,400
- Qualifying total
- £382,000
Illustrative
04·Qualifying expenditure
Competent professional statement - the story pressure-tested before you rely on it.
Illustrative
05·Reviewed & signed
Swipe through the pack
Reviewed · PDF + CSV
Illustrative - real packs link to your own history
Three steps to filing-ready.
Connect once. Aven turns the trail into a reviewed evidence pack - filed by your own adviser, or a regulated R&D tax professional we introduce you to.
01
Connect, read-only
Authorise GitHub, GitLab or Linear - one is enough. We read commit, PR and ticket text only.
02
We build and review your pack
Advance, uncertainty and approach - each claim wired to the evidence trail, then checked by a person before release.
03
File it, your way
Hand the pack to your own adviser - or ask us for a free introduction to a regulated R&D tax professional.
Reviewed by a competent personExperts reduce the risk.
Upgrade when you want an R&D specialist to sharpen the story and flag weak points before the pack reaches whoever files your claim.
Uncertainty
The technical uncertainty is clearly explained.
Evidence
Narratives are backed by linked, dated records.
Risk
Weak or risky areas are flagged before hand-off.
The first packs are in their hands.
Real feedback from our founding cohort. Every pack so far: five stars.
“From connecting our GitHub to holding the finished evidence pack took under two hours. The process barely needed us - and the pack arrived organised the way an adviser actually wants it.”
CTO
Enterprise technology company
“We'd been building proprietary software for years without realising it could qualify. Aven's check surfaced it, the pack made the case, and our claim is now filed through our adviser. We simply wouldn't have known.”
Founder
Private equity firm
“We had shipped a lot of genuinely difficult engineering, but most of it lived across commits, tickets, and old product decisions. Aven helped turn that into a coherent evidence trail without needing our engineers to spend days writing explanations. It made the whole process feel much more professional.”
Founder
AI SaaS company
“Aven saved us from turning R&D evidence into a messy internal project. It pulled the technical work into a clear, accountant-ready pack and helped us explain the “why this was hard” behind the code. The biggest value was confidence: we felt like the claim had proper substance behind it.”
CTO
Fintech startup
“It does exactly what it promises, and the quality of what comes out the other end speaks for itself. I'd recommend Aven to any founder - 100%.”
Founder
Software startup
“The value of Aven was not just saving time, although it definitely did that. It gave us a much stronger evidence base and made the review with our tax adviser far easier. Instead of vague project summaries, we had a structured pack tied back to real engineering work.”
Finance Director
Software scale-up
Feedback from our founding cohort, shared with permission. Roles anonymised.
The things serious teams ask first.
Q01Who is Aven for?
UK software companies whose engineers tackled genuine technical uncertainty - performance, architecture, scaling, data, reliability or similar hard problems.
Q02What do I get after the free check?
If your answers show a defensible path, you can choose a draft evidence pack or add expert review - then file through your own adviser or a regulated R&D tax professional we introduce.
Q03Do you access or store our source code?
Never. Integrations are read-only - we pull commit, PR and ticket text and metadata only, encrypted at rest, and you can disconnect anytime.
Q04Is this automated?
Aven builds your pack from your engineering history and your own account of the work - and nothing is released without passing a human delivery review. Aven Reviewed adds a competent professional's sign-off on top.
Q05Will the numbers be inflated?
No. We're defensible, not maximised. Indicative figures are deliberately conservative ranges. Nothing here is a guarantee, and nothing here is tax advice.
Q06What's the pre-notification deadline?
For most new claimants HMRC must be notified within six months of the accounting period end. A missed window forfeits only that period - if yours has closed we'll say so honestly and scope your pack to a period that's still claimable. Your adviser confirms which.
Q07Do you file my claim with HMRC?
No. Aven assembles defensible evidence for your accountant or R&D tax firm. Filing, liability, scheme selection and loss relief remain their responsibility.
Free eligibility & readiness check
See whether your work is defensible.
About 3 minutes. Read-only, no card, no commitment. UK companies only.
read-only · source code never stored · not tax advice