5 Free
Signatures per month, no credit card
$20/user/mo
Unlimited signatures on Pro
All-in-One
Generate, quote, and sign in one workflow
5 SDKs: TS, Python, PHP, Go, Java
Official SDKs plus REST and e-signature API
TurboSign vs SignatureAPI: Side-by-Side Comparison
How TurboDocx compares to SignatureAPI across pricing, features, and developer experience. Competitor details are cited below.
| Feature | TurboDocx (TurboSign) | SignatureAPI |
|---|---|---|
| Product scope | All-in-one document operations: template-based document generation (DOCX, PPTX, PDF), e-signatures (TurboSign), and CPQ quoting (TurboQuote) in one workflow | E-signature focused; documents are containers for the signing workflow, not a broader document-management platform |
| Pricing model | Per-user monthly subscription with a free tier and unlimited signatures on Pro; standard plans are not metered per envelope (per-envelope pricing is optional) | Usage-based, billed per completed envelope: $25/month Standard plan includes 100 envelopes and 1 dashboard user, then $0.25 per envelope (extra dashboard users $20 each) |
| Developer SDKs and API | Developer-first REST API plus official SDKs in five languages (JavaScript/TypeScript, Python, PHP, Go, Java), with one package per language covering signing, document generation, quoting, and webhooks | REST API (for example POST /v1/envelopes) authenticated with an API key via the X-API-Key header |
| Document generation | API-driven generation of DOCX, PPTX, and PDF from templates using JSON data with variable injection, plus the open-source MIT-licensed html-to-docx library | Not marketed as a document-generation platform; documents serve as containers for the signing workflow |
| Embedded signing | E-Signature API to embed legally binding signing flows with a full audit trail directly into your own application | Supports embedded signing in web applications and React Native |
| Real-time events | Webhooks for document-lifecycle and signature-status events with event filtering and retry and dead-letter handling, so you avoid polling | Envelope lifecycle and recipient status events surfaced as triggers via the official Power Automate connector |
| Business integrations | Direct integrations with Salesforce, HubSpot, ConnectWise PSA, and Wrike to generate and sign documents from live CRM, PSA, and project data | No-code connectors via an official Power Automate connector and Zapier |
| Legal compliance | Legally binding under the U.S. ESIGN Act and UETA with detailed audit trails and email-based signer authentication, plus eIDAS Advanced Electronic Signatures (AES) with HSM-protected keys and long-term validation | States compliance with the ESIGN Act, UETA, and eIDAS (eIDAS SES classification) |
| Free tier | Free tier with no credit card required | Free account with no credit card required; free test account usable indefinitely, with live envelopes billable and legally binding |
Sources, verified July 2026. Competitor pricing and features may change; confirm current details on the vendor site.
Why Teams Choose TurboDocx
Go from first call to signed contract in one workflow: generate the document, build the quote, and collect legally binding signatures inside TurboDocx instead of bolting a signing API onto a separate document stack.
Build faster with a developer-first REST API and official SDKs in five languages (JavaScript/TypeScript, Python, PHP, Go, Java), plus the open-source MIT-licensed html-to-docx library, rather than integrating against a raw REST endpoint alone.
Get predictable per-user subscription pricing with a free tier and unlimited signatures on Pro, so on a subscription your cost does not scale with every completed envelope.
Connect natively to Salesforce, HubSpot, ConnectWise PSA, and Wrike to generate and sign documents from live CRM and PSA data, with webhooks for real-time status events.
Frequently Asked Questions
Does TurboDocx do more than e-signatures, or is it just a SignatureAPI swap?
It does more. SignatureAPI is focused on signing, treating documents as containers for the signing workflow. TurboDocx is an all-in-one document operations platform that generates DOCX, PPTX, and PDF from templates using JSON data with variable injection, and then collects legally binding signatures on that same document, all in one workflow.
How is TurboDocx pricing different from SignatureAPI per-envelope model?
SignatureAPI bills per completed envelope: its $25/month Standard plan includes 100 envelopes and one dashboard user, then charges $0.25 per additional envelope and $20 for each extra dashboard user. TurboDocx uses a per-user monthly subscription with a free tier and unlimited signatures on its Pro plan; its standard plans are not metered per envelope (per-envelope pricing is optional), so on a subscription your cost does not rise with each envelope.
Is migrating from SignatureAPI to TurboDocx a big lift for developers?
Both products are API-first. SignatureAPI uses REST envelope endpoints authenticated with an X-API-Key header, and TurboDocx exposes a developer-first REST API plus official SDKs in JavaScript/TypeScript, Python, PHP, Go, and Java. In practice you re-point your signing calls, and if you also generate documents you can consolidate generation and signing into a single TurboDocx workflow rather than stitching two systems together.
Can I embed signing into my own app like I can with SignatureAPI?
Yes. TurboDocx provides an E-Signature API to embed legally binding signing flows, with a full audit trail, directly into your own application. SignatureAPI similarly supports embedded signing, including in web applications and React Native, so this is a parity capability with TurboDocx adding built-in document generation around it.
Do I lose no-code and workflow automation by switching?
No. SignatureAPI offers no-code connectors via Power Automate and Zapier. TurboDocx provides webhooks with event filtering and retry and dead-letter handling to drive automations without polling, plus direct integrations with Salesforce, HubSpot, ConnectWise PSA, and Wrike to trigger document generation and signing from live business data.
Explore more: e-signatures with TurboSign, template-based document generation, CPQ quoting, the e-signature API and SDKs, our open-source tooling, and e-signature compliance in the US and the EU (eIDAS and AES). See how MSP teams use it end to end.
Related Resources
Learn more about TurboDocx and how it compares to SignatureAPI
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