Best Electronic Signature Software in 2026
Updated
35 electronic signature software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
35ranked
1free plans on this page
$1.50/molowest paid tier
9 Oct 2026last checked
Electronic Signature Software, one module each. A lit port is something its maker publishes; 3 of the 10 on this page have a public API.
- 26 OneSpan Sign API yesOSS not on recordFREE not on recordDOCS 6.6$22/mo
- 27 signNow API yesOSS not on recordFREE not on recordDOCS 6.6$1.50/mo
- 28 Formstack Sign API yesOSS not on recordFREE not on recordDOCS 6.5$250/mo
- 29 Adobe Scan API not on recordOSS not on recordFREE not on recordDOCS 5.6
- 30 FreeSign API not on recordOSS not on recordFREE yesDOCS 5.5Free
- 31 Formstack Forms API not on recordOSS not on recordFREE not on recordDOCS 5.2$83/mo
- 32 Dokobit API not on recordOSS not on recordFREE not on recordDOCS 5.1
- 33 eSign.AI API not on recordOSS not on recordFREE not on recordDOCS 5.1
- 34 SignatureAPI API not on recordOSS not on recordFREE not on recordDOCS 5.1$25/mo
- 35 Sertifi API not on recordOSS not on recordFREE not on recordDOCS 4.9
Compare all 10 in a table
| # | Platform | Score | Free plan | From | Free plan | Paid from | Monthly send limit | Templates included |
|---|---|---|---|---|---|---|---|---|
| 26 | OneSpan Sign | 6.6 | No | $22/mo | No | 22 /user/mo | — | — |
| 27 | signNow | 6.6 | No | $1.50/mo | No | 8 /user/mo | — | — |
| 28 | Formstack Sign | 6.5 | No | $250/mo | No | — | — | — |
| 29 | Adobe Scan | 5.6 | No | — | No | — | — | — |
| 30 | FreeSign | 5.5 | Free plan | Free | Yes | — | — | — |
| 31 | Formstack Forms | 5.2 | No | $83/mo | No | — | — | — |
| 32 | Dokobit | 5.1 | No | — | Yes | — | — | — |
| 33 | eSign.AI | 5.1 | No | — | Yes | — | — | — |
| 34 | SignatureAPI | 5.1 | No | $25/mo | No | — | 100 /mo | — |
| 35 | Sertifi | 4.9 | No | — | No | — | — | — |
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