Freedom251 › E-Signature APIs Software
SignatureAPI
What SignatureAPI is
SignatureAPI is paid web software for sending documents for electronic signature. It provides API access, identity verification, an audit trail, and signing order configurable in either direction. Bulk sending is not available. The Standard plan costs $25 a month, billed monthly, and includes the first 100 envelopes plus one dashboard user. Additional envelopes cost $0.25 each, and additional dashboard users cost $20 each. The listed monthly send limit is 100. SignatureAPI has no free plan, so use requires a paid subscription. Buyers can assess whether the included envelope allowance and dashboard seat match their workflow, and whether they need API connectivity, identity checks, audit records, or a particular signing sequence. Teams sending documents in volume should note the absence of bulk sending.
Who it suits
It suits organizations seeking web-based electronic-signature sending with API access, identity verification, audit trails, and configurable signing order. Teams requiring bulk sending should look elsewhere or account for that limitation.
What it does well
- Includes API access
- Provides identity verification
- Maintains an audit trail
- Supports either signing order
- Standard includes 100 envelopes
What to know first
- No free plan
- Bulk sending is unavailable
- Additional envelopes cost $0.25 each
- Additional dashboard users cost $20 each
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Standard | billed monthly · First 100 envelopes included · Additional envelopes cost $0.25 each · First dashboard user included · Additional dashboard users cost $20 each | $25 a month |
| Enterprise | Contact sales · Annual contracts and prepaid credits available | On request |
As signatureapi.com lists them, read 19 Sept 2026. The maker's own page has the final word.
Verdict
SignatureAPI covers core electronic-signature controls and developer access through a straightforward paid plan. Its 100-envelope allowance and lack of bulk sending are important considerations for higher-volume workflows.
Where SignatureAPI stands on Freedom251
- E-Signature APIs Software#24 of 26
- Electronic Signature Software#33 of 33