E-signatures API for your app averaging ~3¢ per envelope
At €0.029 per envelope (about 3¢), Firma.dev runs about 99% cheaper than DocuSign, where one envelope can cost $4-5. Pay-as-you-go, no minimums, no contracts. Built developer-first for startups and SaaS teams who'd rather integrate signing in an afternoon than sit through a sales cycle: clean REST API, embeddable template and signing editors, integration in hours. Test everything free with a sandbox key, real docs and unlimited usage, before you pay a cent. Get an API key and start building.
Hey Product Hunt, Derick here, co-founder of Firma.dev.
We built Firma.dev because every e-signature API we tried was either priced for enterprises or was an end-user app with an API bolted on as an afterthought. We wanted the opposite: an API-first product where signing is something you integrate in an afternoon, not a procurement cycle.
💸 Pricing. €0.029 per envelope, about 3¢, pay-as-you-go with no minimums or contracts. DocuSign can run $4-5 for a single envelope, so for most teams that's around 99% less.
🛠️ Who it's for. If your product touches contracts, you need this: HR and onboarding tools sending offer letters, property platforms handling leases, freelance marketplaces with client agreements, healthtech collecting consent forms, fintech onboarding flows, or any SaaS sending NDAs and proposals. At 3¢ per envelope you can make signing a built-in feature instead of a cost center.
⚡ Developer-first. Clean REST API, embeddable template and signing editors, and you can give each of your own customers an isolated workspace with separate templates and usage.
🤖 Built for AI-assisted development. We ship two MCP servers, one for our docs and one for the API itself with 84 tools, so coding agents generate accurate Firma.dev integration code and can even manage signing requests directly. We have a guide for Claude Code, plus Antigravity, Cursor, Lovable and the rest in our docs.
🌍 Legality. Designed to support the frameworks that matter, and e-signatures are legally recognized in 55+ countries.
🔑 Try it free. There's a sandbox key with real documents and unlimited usage, so you can test the whole flow before paying anything. No demos, no sales calls.
We'd love your feedback, especially from anyone who's fought with e-signature integrations before. I'll be around all day to answer questions.
Derick
Happy Friday hunters. 😎
About Firma.dev on Product Hunt
“E-signatures API for your app averaging ~3¢ per envelope”
Firma.dev launched on Product Hunt on June 12th, 2026 and earned 253 upvotes and 32 comments, earning #1 Product of the Day. At €0.029 per envelope (about 3¢), Firma.dev runs about 99% cheaper than DocuSign, where one envelope can cost $4-5. Pay-as-you-go, no minimums, no contracts. Built developer-first for startups and SaaS teams who'd rather integrate signing in an afternoon than sit through a sales cycle: clean REST API, embeddable template and signing editors, integration in hours. Test everything free with a sandbox key, real docs and unlimited usage, before you pay a cent. Get an API key and start building.
On the analytics side, Firma.dev competes within API and Developer Tools — topics that collectively have 612.1k followers on Product Hunt. The dashboard above tracks how Firma.dev performed against the three products that launched closest to it on the same day.
Who hunted Firma.dev?
Firma.dev was hunted by Ben Lang. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Firma.dev including community comment highlights and product details, visit the product overview.
Ben Lang
Hey Product Hunt, Derick here, co-founder of Firma.dev.
We built Firma.dev because every e-signature API we tried was either priced for enterprises or was an end-user app with an API bolted on as an afterthought. We wanted the opposite: an API-first product where signing is something you integrate in an afternoon, not a procurement cycle.
💸 Pricing. €0.029 per envelope, about 3¢, pay-as-you-go with no minimums or contracts. DocuSign can run $4-5 for a single envelope, so for most teams that's around 99% less.
🛠️ Who it's for. If your product touches contracts, you need this: HR and onboarding tools sending offer letters, property platforms handling leases, freelance marketplaces with client agreements, healthtech collecting consent forms, fintech onboarding flows, or any SaaS sending NDAs and proposals. At 3¢ per envelope you can make signing a built-in feature instead of a cost center.
⚡ Developer-first. Clean REST API, embeddable template and signing editors, and you can give each of your own customers an isolated workspace with separate templates and usage.
🤖 Built for AI-assisted development. We ship two MCP servers, one for our docs and one for the API itself with 84 tools, so coding agents generate accurate Firma.dev integration code and can even manage signing requests directly. We have a guide for Claude Code, plus Antigravity, Cursor, Lovable and the rest in our docs.
🌍 Legality. Designed to support the frameworks that matter, and e-signatures are legally recognized in 55+ countries.
🔑 Try it free. There's a sandbox key with real documents and unlimited usage, so you can test the whole flow before paying anything. No demos, no sales calls.
We'd love your feedback, especially from anyone who's fought with e-signature integrations before. I'll be around all day to answer questions.
Derick
Happy Friday hunters. 😎