Zoho Sign
by Zoho Sign Free plan Free trial From $10 a month, billed yearly AndroidiPhone & iPadWebWindowsMacBrowser extension+1
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Best E-Signature APIs Software 2026
Facts read 19 Sep 2026 – 19 Oct 2026
E-signature APIs software lets a product add electronic signing workflows through an API. This list helps teams compare tools by pricing, signing controls, events, sending capacity and developer support.
The standings: top 10
| Name | In a line | Record score | Price from | Try it free | Runs on | Facts read |
|---|---|---|---|---|---|---|
| 01 Zoho Sign | 6.4 | $10 a month, billed yearly | Free plan | Android, iPhone & iPad, Web, Windows | 15 Oct 2026 | |
| 02 OpenSign | OpenSign may suit individuals and businesses that need document signing, reusable templates, or API-based signing workflows. | 6.3 | $9.99 a month | Free plan | Web, Windows, Mac, Linux | 15 Oct 2026 |
| 03 Dropbox Sign | Dropbox Sign suits individuals and businesses that send agreements for signature and want to track requests or send reminders. | 6.0 | Free plan | Free plan | Android, iPhone & iPad, Web, API | 19 Oct 2026 |
| 04 Skribble | 6.0 | €23 a month, billed yearly | Free plan | Android, iPhone & iPad, Web, API | 4 Oct 2026 | |
| 05 Signeasy | Signeasy suits individuals or teams that need to sign and manage documents across mobile and web, or developers building eSignature workflows through an API. | 5.7 | $10 a month, billed yearly | Free plan | Android, iPhone & iPad, Web, API | 3 Oct 2026 |
| 06 SignRequest | SignRequest suits individuals and teams that need to prepare and sign documents online, including those who want reusable templates or a defined signing order. | 5.7 | €9 a month | Free plan | Android, iPhone & iPad, Web, API | 4 Oct 2026 |
| 07 BoldSign | BoldSign may suit individuals or teams sending documents for signature, including developers embedding signing workflows through its APIs and SDKs. | 5.5 | $5 a month, billed yearly | Free plan | Android, iPhone & iPad, Browser extension, API | 28 Sep 2026 |
| 08 eSignatures.com API | 5.5 | Free plan | Free plan | Web, API | 8 Oct 2026 | |
| 09 eSignly | eSignly suits individuals and teams that need to send, sign, or automate document workflows. | 5.5 | $10 a month, billed yearly | Free plan | Android, iPhone & iPad, API | 28 Sep 2026 |
| 10 Xodo Sign | It suits individuals and teams that need electronic signatures, document templates, and audit records across mobile devices or API workflows. | 5.5 | Free plan | Free plan | Android, iPhone & iPad, API | 28 Sep 2026 |
The page orders releases from newest to oldest, using figures the makers publish without scoring. Compare platform support across API, web, Android, iOS, macOS and Windows.
02
OpenSign
OpenSign may suit individuals and businesses that need document signing, reusable templates, or API-based signing workflows.
WebWindowsMac+3 Record6.3 Visit
03
Dropbox Sign
Dropbox Sign suits individuals and businesses that send agreements for signature and want to track requests or send reminders.
AndroidiPhone & iPadWeb+1 Record6.0 Visit
04
Skribble
AndroidiPhone & iPadWeb+1 Record6.0 Visit
05
Signeasy
Signeasy suits individuals or teams that need to sign and manage documents across mobile and web, or developers building eSignature workflows through an API.
AndroidiPhone & iPadWeb+1 Record5.7 Visit
6
SignRequest
AndroidiPhone & iPadWeb+1 €9 a month Record5.7 Visit SignRequest suits individuals and teams that need to prepare and sign documents online, including those who want reusable templates or a defined signing order.
7
BoldSign
AndroidiPhone & iPadBrowser extension+1 $5 a month, billed yearly Record5.5 Visit BoldSign may suit individuals or teams sending documents for signature, including developers embedding signing workflows through its APIs and SDKs.
9
eSignly
AndroidiPhone & iPadAPI $10 a month, billed yearly Record5.5 Visit eSignly suits individuals and teams that need to send, sign, or automate document workflows.
10
Xodo Sign
AndroidiPhone & iPadAPI Free plan Record5.5 Visit It suits individuals and teams that need electronic signatures, document templates, and audit records across mobile devices or API workflows.
13
DocuSign eSignature
API $11 a month, billed yearly Record4.7 Visit It suits individuals and organizations that send agreements for signatures and need tools such as reusable templates, approval workflows, or renewal tracking.
15
DocuSeal
API $20 a month Record4.2 Visit DocuSeal suits organizations needing electronic signatures, templates, bulk requests, or API integration.
16
SignWell
API $10 a month, billed yearly Record3.8 Visit SignWell suits people and organizations needing electronic signatures through an API.
19
Adobe PDF Services API
Web Free plan Record3.3 Visit It suits developers and teams that need PDF creation or document workflows through an API.
Before you choose
Compare plan and usage costs
Check the Free plan and Paid from fields together. A free plan can provide a starting path, while paid pricing shows the published entry point.
Review the sandbox environment and monthly envelope limit before choosing a plan. These fields indicate how you can test and how signing volume is measured.
Match signing and event controls
Compare the signing methods a tool supports with the way your workflow collects signatures. Webhook events show which activity can be sent back to your application.
Bulk sending matters when one workflow must distribute documents to multiple recipients. Check this field alongside the event options.
Check platforms and SDK languages
Confirm that the platform you need is listed: API, web, Android, iOS, macOS or Windows. Platform coverage can affect where you build and manage a signing flow.
Review the SDK languages before committing code. A language match can reduce the integration work for your application.
Review trials and code access
A free trial can let you assess a paid service before purchase. Check the trial terms shown for the tool you are considering.
Open-source code is available in this category. If code access matters, read the licence and confirm that it fits your project.
Questions
What platforms do these e-signature APIs support?
Platform fields cover API, web, Android, iOS, macOS and Windows. Check the platform entry for the tool you are considering.
Are free plans available?
Yes. Free plans are offered by tools in this category. Paid from values are listed separately where provided.
Can I try a paid e-signature API before buying?
A free trial is offered by tools in this category. Trial length and terms vary, so check the listing details.
Which workflow features should I compare?
Compare signing methods, webhook events and bulk sending. These fields describe how signing actions, notifications and larger sends fit your workflow.
What developer details are listed?
The comparison includes SDK languages and platform support, plus sandbox environment and monthly envelope limit fields.
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