Short answer: there is no single best tool; the right one depends on what you already run. If you need AI Act scoping, classification and documentation without a sales call, start with free, AI-Act-native tools. If you already live in a security-compliance suite such as Vanta or OneTrust, add its AI Act module. If you need full conformity workflows and have a budget, look at Modulos. In the DACH market, heyData and DataGuard bundle the AI Act with GDPR.
Disclosure: Legalithm publishes this guide and is one of the tools compared. We rank by use case rather than naming an overall winner, state our own limits, and checked every competitor claim against the vendor's own pages on 9 October 2026. Where a fact could not be confirmed, we say so.
Start here: whether the AI Act treats your system as high-risk takes about five minutes to check with the free EU AI Act assessment.
TL;DR
- Need answers before you need software? Use free tools first: the Legalithm assessment, the European Commission's AI Act Service Desk compliance checker, or the Future of Life Institute's checker on artificialintelligenceact.eu.
- Already doing SOC 2 or ISO 27001? Vanta covers AI Act classification, inventory and impact assessments inside the same platform, with an EU (Frankfurt) tenant available on request.
- Already on OneTrust for GDPR? Its AI governance module avoids a second vendor and offers several EU hosting regions.
- Need conformity workflows end to end (FRIA, Annex IV, CE marking)? Modulos has the deepest AI Act workflow coverage we found.
- German-speaking SME wanting AI Act plus GDPR from one provider? heyData and DataGuard.
- Primary concern is model behaviour and bias? Holistic AI.
Deadlines in brief: prohibited practices and AI literacy apply since 2 February 2025, GPAI obligations since 2 August 2025, and Article 50 transparency since 2 August 2026. After the Digital Omnibus (Regulation (EU) 2026/1744), standalone high-risk systems (Annex III) apply from 2 December 2027 and high-risk AI embedded in regulated products (Annex I) from 2 August 2028. Fines under Article 99 reach €35M or 7% of turnover for prohibited practices and €15M or 3% for most other breaches, but under Article 99(6) SMEs pay the lower of the two figures.
Selection criteria: what "best for startups" actually means
A platform built for a bank governing 500 models is not the platform for a 15-person SaaS company shipping its first LLM feature. Five criteria separate them.
1. AI-Act-native depth. The Act's core obligations, Annex III classification, Annex IV technical documentation, conformity assessment and human oversight, are not visible from your cloud infrastructure. A tool built on the evidence-collection model of SOC 2 can track controls but cannot tell you whether you fall under Annex III. Ask which AI Act obligations the tool produces output for, not whether it "supports the AI Act".
2. Self-serve. Can you sign up and get a useful answer today, or do you need a demo and a quote? Of the paid platforms below, none offers instant self-serve sign-up on its public pages; free tools are the exception.
3. Price you can justify. Few vendors publish prices. Where we cite one, we say whether it comes from the vendor or a third party such as Vendr or a review site. Treat third-party figures as signals, not quotes.
4. EU hosting. Several US vendors now offer EU data residency, usually on request. Ask where your data is stored and where it is processed, and whether the EU region is the default.
5. Time-to-value. Can you answer Does the Act apply to me? What risk tier am I in? What documents do I owe? in an afternoon?
EU AI Act compliance software compared (October 2026)
Legalithm (ours): free AI Act tools first, paid operation later
Legalithm is built for the company that needs the AI Act answers before it can justify a platform. The free tools need no account: the Applicability Checker, the risk Assessment, the Penalty Calculator with the SME lower cap, the Annex IV generator, the FRIA generator and the Article 50 disclosure generator. They stay free. Paid plans cover the hosted work, keeping a product's compliance record current and signed, from €1,500 per product per year; billing is not live yet, so both paid options start with a conversation.
Strengths: built for the AI Act rather than retrofitted; answers in minutes without a sales call; application data stored in Frankfurt. Limits: an early-stage company; no SOC 2, ISO 27001 or ISO 42001 certification (security page); covers the AI Act, CRA and EAA, not SOC 2, DORA or NIS2. Best for: EU startups and SMEs that need to know their obligations and produce first documents before committing budget.
Vanta: best if you already run security compliance on it
Vanta launched EU AI Act coverage in October 2024: role and risk classification, an AI use-case inventory, impact assessments aligned to the Act, transparency records and templates. Its EU tenant runs in Frankfurt on request, and it supports customers from an EU team in several European languages. For CE marking it refers customers to specialists rather than running a conformity workflow. Best for: teams already in Vanta for SOC 2, ISO 27001 or ISO 42001 who want AI Act work in the same dashboard. For where the gap matters, see the best Vanta alternative for EU AI Act compliance.
OneTrust: best if you already run it for privacy
OneTrust's AI governance, generally available since December 2023, adds an AI inventory covering models, agents and datasets, AI Act risk tiering, model documentation and runtime controls to its privacy platform. It offers the widest choice of hosting regions in this list, including Frankfurt, Paris and Zurich. It is sales-led with quotes based on users and inventory size. Best for: companies already standardised on OneTrust. We compare it with dedicated tools in the best OneTrust alternative for EU AI Act compliance.
Modulos: deepest conformity workflows
Modulos, based in Zurich, covers the most AI Act workflow steps we could confirm: an Annex III decision tree, FRIA templates, Annex IV documentation, conformity assessment, CE marking and post-market monitoring, alongside ISO 42001 and monetary risk quantification. It announced a free Starter Plan in January 2025 (one user, one project, request-gated); check that it is still offered. Best for: mid-market companies with high-risk systems and a governance budget.
Holistic AI: best for model behaviour and bias
Holistic AI's strength is technical: bias and algorithm audits, risk classification and readiness assessments, and monitoring of AI agents, for which Gartner lists it as a representative vendor. It is demo-led with undisclosed pricing and does not publish hosting details. Best for: organisations whose main risk is how models behave rather than the paperwork.
heyData and DataGuard: AI Act plus GDPR in the DACH market
heyData (Berlin) offers an AI inventory, guided risk classification, role determination between provider, deployer, importer and distributor, and AI literacy training for Article 4, the broadest startup-relevant AI Act set we found among German providers. DataGuard (Munich) has a dedicated AI Act module with risk classification and pairs its software with consulting; a third-party review suggests it fits companies with more than about ten employees. Both are quote-based, and neither names FRIA or Annex IV generation on its pages.
Saidot and Credo AI: governance platforms
Saidot (Helsinki) is an AI-governance-only platform with an AI inventory, an AI Act classification template and a policy library. Credo AI offers an AI registry with risk classification and AI Act policy packs, sold through cloud marketplaces. Neither publishes prices.
Free public checkers
The European Commission's AI Act Service Desk compliance checker (in beta) gives an indicative view of which obligations apply to your role. The EU AI Act Compliance Checker on artificialintelligenceact.eu is run by the Future of Life Institute, which states it is not affiliated with the EU. Both are good for orientation; neither produces or maintains your documentation.
Developer tools
If you want classification inside your codebase or AI agent, there are open-source options under the MIT licence: Legalithm's CLI and MCP server (see developer tools) and Lexbeam's EU AI Act MCP server, which is actively maintained.
What we left out
Secfix and Drata are strong security-compliance platforms, but on their own pages they address the AI Act through ISO/IEC 42001 only, without AI Act classification or documentation. ISO 42001 helps, but certification does not by itself show AI Act conformity. Trustible targets regulated enterprises in the US.
A practical recommendation
- Get the answers first. Run the Applicability Checker and the Assessment, or one of the public checkers. Free, and minutes, not weeks.
- If you are high-risk under Annex III, draft your Annex IV documentation and plan conformity work. You have until 2 December 2027, but the documentation takes longer than teams expect.
- If you already run a compliance suite, check whether its AI Act module produces the documents you owe, not just controls to tick.
- Buy a platform when you need ongoing operation, not before.
For a walkthrough aimed at smaller companies, read the EU AI Act compliance guide for startups & SMEs. The full vendor matrix is in EU AI Act compliance software and tools compared for 2026.
Frequently asked questions
Is there free EU AI Act compliance software?
Yes. The European Commission's AI Act Service Desk checker and the Future of Life Institute's checker are free for orientation. Legalithm's tools, including the applicability checker, risk assessment, penalty calculator and Annex IV and FRIA generators, are free with no account and stay free. Modulos announced a free Starter Plan in 2025, gated by request.
What's the cheapest EU AI Act compliance software for a startup?
Free tools cost nothing. Among paid platforms almost no vendor publishes prices. Third-party signals put heyData from about €89 a month and DataGuard at about €200 to €2,000 a month, while Vanta's median contract on Vendr is about $20,000 a year. Legalithm's published floor for hosted work is €1,500 per product per year.
Do startups and SMEs really need EU AI Act software, or can we use spreadsheets?
A spreadsheet can track obligations once you know them. It cannot tell you your risk tier or draft your Annex IV file. Start with a free assessment, then decide whether the work that follows justifies a platform.
When do EU AI Act obligations apply to my company?
Prohibited practices and AI literacy since 2 February 2025, GPAI obligations since 2 August 2025, and Article 50 transparency since 2 August 2026. After the Digital Omnibus, standalone high-risk systems (Annex III) apply from 2 December 2027 and embedded high-risk systems (Annex I) from 2 August 2028. If your product has a chatbot or generates content, Article 50 already applies. The Omnibus Tracker keeps the timeline current.
Is Vanta or OneTrust enough for the EU AI Act?
Both now cover AI Act classification, inventory and assessments, and both offer EU hosting. Neither, on its public pages, runs the full conformity workflow (Annex IV technical documentation through CE marking) that a high-risk provider needs. If you already use one, start there and check what it produces; if you don't, you don't need one to get started.
Does ISO 42001 certification make us AI Act compliant?
No. ISO/IEC 42001 is a management-system standard that supports AI Act work, but it does not classify your systems or produce the technical documentation the Act requires, and it is not a harmonised standard under the Act.
Not sure where you stand? Run the free EU AI Act Assessment: a few minutes tells you your risk tier, your exposure, and which documents you owe.
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About the author
Pedram Madani, founder of Legalithm. He researches large language models in software engineering and has two peer-reviewed IEEE papers.
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