The short answer
Dropbox Sign API is billed per-request monthly tiers. It has a free tier: Free Test Mode sandbox + free plan (3 requests/30 days). The paid plans we list start at $75/mo (or $900/yr) (Essentials).
Plans and prices
| Plan | Price | What it covers |
|---|---|---|
| Test Mode | Free (or $180/yr) | Sandbox for building and testing against every endpoint with watermarked, non-binding documents before going to production. |
| Essentials | $75/mo (or $900/yr) | Starts at ~50 signature requests/month. Templates, API dashboard, audit trail, 6-language SDKs, embedded signing. |
| Standard | $250/mo (or $3,000/yr) | Starts at ~100 requests/month. Adds advanced signing tools, conditional-logic fields, and data residency options. |
| Premium | Custom quote | All Standard features plus premium/white-label branding, electronic ID (eID) support, and unlimited SMS tools; for 500+ requests/month. |
How Dropbox Sign API bills you
The pricing model is per-request monthly tiers. The former HelloSign API, known for an unusually clean developer experience and official SDKs across all major languages with a free test mode. Best suited to: developer-friendly embedded signing at mid-market scale.
What to watch for on the bill
- Production API pricing floor is high: $75/mo for only ~50 requests, $250/mo for Standard
- Advanced features (conditional-logic fields, data residency, SMS auth, eID) are gated to higher/custom tiers
- Premium tier requires a custom sales quote with no public pricing transparency
The pricing page we read
Source: https://sign.dropbox.com/products/dropbox-sign-api/pricing. Prices change, so confirm there before you commit.
Compare Dropbox Sign API with alternatives
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Other e-signature apis: DocuSign eSignature API, PandaDoc API, BoldSign API, Adobe Acrobat Sign API, SignWell API.
Looking at quality rather than price? See the Dropbox Sign API score on APIbenchmarks. Full entry: Dropbox Sign API pricing.