Firma.dev

firma.dev · checked 9 Oct 2026

#19 · E-Signature APIs Software

Visit firma.dev ↗ Alternatives Firma.dev vs Legalesign API

How it plugs in

YesPublic API

NoOpen source

TrialFree tier

Signal on E-Signature APIs Software5.5#19 of 26

Firma.dev is an e-signature API for embedding document signing in applications, aimed at developers and SaaS platforms.

Pricing

Pay as you goBilled in your local currency; no minimums, contracts, or per-seat fees · Flat fee at any volume · unlimited teams · full API access · unlimited free testing with real documents€0.05 one-time
Priority Support€100/Month · Email support · guaranteed 1 business day response times€100/mo

As firma.dev lists them, checked 9 Oct 2026.

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Runs on

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Windows
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Linux
iOS
Android

Facts

Website: firma.dev
Price: From €100/mo
Free trial: Yes
Audit records: Signature events generate immutable audit records containing signer identity, timestamps, signer IP address, document hash, and consent record.
Data residency: Customer documents, metadata, audit logs, and backups are stored exclusively in EU data centers, and EU-only residency cannot be changed.
Document retention: Documents are retained indefinitely unless deletion is requested, and customers can request full account and data deletion.
Encryption: Documents and metadata are encrypted at rest with AES-256 and protected in transit with TLS 1.2 or higher.
Free testing: Every account includes a free testing-mode API key for unlimited tests with real documents; test envelopes are marked as test.
Integrations: Firma.dev lists 27 integrations across seven categories, including MCP, Claude Code, ChatGPT, Salesforce, n8n, Zapier, Bubble, and WordPress.
Link validity: Signing links expire after seven days by default, with custom expiration windows configurable when creating templates.
Service level: Firma.dev says it does not currently offer formal SLAs and provides a public system status page.
Signing workflow: The API can send documents from templates or direct PDF uploads, manage multiple recipients and signing order, and return status updates, signed documents, audit trails, and certificates.
Teams: The API includes unlimited customer teams with isolated workspaces at no extra cost.
White labeling: The service supports custom branding and embedded template and signing editors for customer-facing applications.

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