What is Firma.dev?

Firma.dev is a developer-first e-signature API that lets you embed document signing directly into your own application. Built for SaaS teams and startups, it offers a clean REST API, embeddable template and signing editors, and ultra-low pricing at just €0.029 per envelope — roughly 3 cents. That's about 99% cheaper than DocuSign, where a single envelope can cost $4–5. There are no minimums, no contracts, and no subscription fees. You pay as you go, buying credits only when you need them. Firma.dev is SOC 2, ISO 27001, eIDAS, and GDPR compliant, with a 4.9-star rating on G2.

Who it's for

• Startups and SaaS teams who need to add e-signatures without a lengthy sales cycle or enterprise pricing.
• Developers who want a simple REST API, pre-built UI components, and webhook events to integrate signing in hours, not weeks.
• Product builders who need a fully white-labeled, resell-ready signing experience they can rebrand and bundle as their own.

Key features

Effortless Integration

Add signing workflows in minutes with just a few lines of code. The REST API works with any programming language, and you can test everything free with a sandbox key, real documents, and unlimited usage before paying a cent.

Ultra-Low Pricing

At only a few cents per envelope, Firma.dev eliminates subscription fees and hidden costs. Buy credits as you need them — no minimums, no contracts, no surprises.

Fully White-Labeled

Embed e-signatures seamlessly with your own branding and UX. The entire experience can be rebranded, making it ideal for SaaS platforms that want to offer signing as a native feature.

Developer-first Toolkit

Access Swagger/OpenAPI docs, pre-built UI components, webhook events, and sample apps. Manage unlimited teams, track document lifecycle events in real time, and build live dashboards with server-sent events.

What stands out

"At €0.029 per envelope, Firma.dev runs about 99% cheaper than DocuSign — and you can integrate it in an afternoon."

That price difference is staggering for any team sending more than a handful of documents. Combine it with a fully white-labeled, resell-ready platform, and you're not just saving money — you're turning e-signatures into a revenue stream. The sandbox testing with real documents and unlimited usage means you can build and validate your integration without any financial commitment.

Worth checking out if…

You're a developer or product manager at a startup or SaaS company that needs to add e-signatures quickly, cheaply, and without vendor lock-in. If you're tired of enterprise pricing, long sales cycles, and redirecting users to third-party signing portals, Firma.dev gives you a clean, embeddable alternative that you can rebrand as your own. It's also worth a look if you want to resell e-signature capabilities to your own customers with easy team management and complete data isolation.