Vanta alternative: the open-source route to NIS 2
Vanta is the best-known compliance automation platform in the world. It is also US-built, priced by sales call and rented, never owned. This page is the honest comparison: what Vanta does well, where it does not fit a European mid-sized company, and when you should still pick it.
What Vanta is, and why people search for an alternative
Vanta, founded in San Francisco in 2018, is the category leader in compliance automation. The product grew up around SOC 2, the audit US software buyers ask their vendors for, and now covers more than 35 frameworks including ISO 27001, GDPR and, since October 2024, NIS 2. Its core promise is automated evidence collection through integrations with cloud and SaaS tooling.
Three things send people looking for an alternative. Pricing requires a sales call: the pricing page names four tiers and no numbers (checked 8 September 2026). The platform is US SaaS that you rent, with your compliance data in the vendor's cloud. And NIS 2 support is one entry in a large framework catalog, built as a cross-regional control set that works in any country, which is another way of saying it is not built from the national law your supervisor will actually cite.
This page compares Vanta with open-isms, the free, AGPL-licensed, self-hostable ISMS behind nisd2.eu. open-isms was built NIS 2 first: the 49 requirements of the German transposition are its backbone, not a catalog entry.
Integration depth
Hundreds of integrations pull evidence automatically from cloud providers, identity systems and developer tooling. If your stack is modern US SaaS, a large share of routine evidence collects itself.
SOC 2 and the US audit machine
For SOC 2 and ISO 27001 audit preparation, Vanta is a proven route with an attached auditor network. If US enterprise customers demand SOC 2 from you, this is what the product was born for.
Trust centers and questionnaires
Polished, buyer-facing trust pages and AI-assisted answers to security questionnaires. Useful for software vendors who face a stream of customer due-diligence requests.
Pricing behind a sales call
The pricing page shows the tiers Essentials, Plus, Professional and Enterprise and no prices (checked 8 September 2026). In our May 2026 audit of 150 GRC vendors, 120 published no prices. Budgeting for the tool means negotiating for it first.
US SaaS, no self-hosting
Your compliance record lives in Vanta's cloud, under US jurisdiction. There is no way to run it on your own infrastructure. For entities that weigh data sovereignty in their own supply-chain assessments, the ISMS itself becomes a line item in that assessment.
NIS 2 as one catalog entry
Vanta added NIS 2 in October 2024 as a cross-regional control set designed to apply regardless of country. NIS 2 is a directive: what binds you is the national transposition, in Germany the BSIG, with its own requirement texts, registration duty and deadlines. A control set that fits every member state is anchored in none of them.
Built for funded software companies
The product and its pricing motion target companies that sell software and need certifications to close deals. A 120-person utility, logistics firm or clinic that must meet NIS 2 pays for automation built around a stack it does not run.
49 requirements, legal anchor first
Every requirement carries its citation in the law, from the German BSIG transposition back to the directive, with cross-mappings to GDPR, the EU AI Act and the CRA. The data model is public and on npm; if you disagree with a mapping, that is a pull request, not a support ticket.
Evidence while you operate
Each requirement has an owner, a deadline and a sign-off. Approvals and changes land in an append-only audit log. The evidence for your audit accumulates during operation instead of being reconstructed the week before.
Open source and self-hostable
AGPL-3.0, the full platform on GitHub, a reference docker compose for your own hardware. An open ISMS can be verified instead of merely promised, and there is no lock-in to leave behind.
Free platform, paid help
The platform costs nothing, hosted or self-hosted. Revenue comes from training and operated hosting. There is no license to negotiate and no per-framework surcharge.
If US enterprise customers require SOC 2 from you, your stack is modern cloud SaaS, and you want managed automation with an auditor network attached, Vanta is a strong product and the honest recommendation.
If NIS 2 is the framework you actually have to meet, you are in the EU, and you want your evidence system under your own control without a procurement cycle, that is the case open-isms was built for. Some companies run both: SOC 2 in Vanta for the US market, NIS 2 in open-isms.
Does Vanta support NIS 2?
Yes. Vanta added NIS 2 in October 2024 as one of more than 35 frameworks, implemented as a cross-regional control set. What it does not carry is the national transposition layer: the German BSIG requirement texts, the registration duty and the national deadlines that a supervisor will cite.
What does Vanta cost?
Vanta publishes no prices; the pricing page names four tiers and directs you to a demo call (checked 8 September 2026). We will not invent a number. Third-party negotiation guides exist precisely because the price is set in the sales process.
Is there a free, open-source alternative to Vanta?
Yes, a small cluster: open-isms (NIS 2 first, EU focus), verinice (IT-Grundschutz heritage), CISO Assistant (broad framework catalog) and Eramba (generic GRC). They differ in focus; all are genuinely open source. This page argues for one of them, and says so openly.
Can I self-host Vanta?
No. Vanta is SaaS only. open-isms ships a reference docker compose setup and runs on your own infrastructure; the same codebase powers the hosted version at nisd2.eu.
Can I use Vanta and open-isms together?
Yes. The open data model maps NIS 2 requirements to ISO 27001 controls, so work done for one framework is visible against the other. Running SOC 2 or ISO in Vanta and NIS 2 in open-isms is a workable split, and the export takes your data with you either way.
- Vanta pricing page, checked 8 September 2026: tiers Essentials, Plus, Professional, Enterprise; no public prices. vanta.com/pricing
- Vanta NIS 2 product page and October 2024 framework announcement: cross-regional control set. vanta.com/products/nis2
- Own audit of 150 GRC vendor pricing pages, May 2026: 120 publish no prices. Methodology in the GRC comparison article.
- open-isms source code, NIS 2 data model and reference self-hosting setup. github.com/NISD2/open-isms