# Adobe Acrobat Sign vs airSlate SignNow

> airSlate SignNow scores 68.5 (B) on agent readiness against Adobe Acrobat Sign's 52.6 (D), and leads in 6 of 7 scored categories. Both do esign send. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/adobe-acrobat-sign-vs-signnow
- Markdown: https://www.anchorterminal.com/compare/adobe-acrobat-sign-vs-signnow.md (~2,200 tokens)
- Slim: https://www.anchorterminal.com/compare/adobe-acrobat-sign-vs-signnow.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/adobe-acrobat-sign-vs-signnow.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

airSlate SignNow scores 68.5 (B) on agent readiness against Adobe Acrobat Sign's 52.6 (D), and leads in 6 of 7 scored categories. Both do esign send.

- Adobe Acrobat Sign: grade D, 52.6/100, rank #652 of 842. Markdown https://www.anchorterminal.com/tools/adobe-acrobat-sign.md · JSON https://www.anchorterminal.com/api/v1/tools/adobe-acrobat-sign.json
- airSlate SignNow: grade B, 68.5/100, rank #201 of 842. Markdown https://www.anchorterminal.com/tools/signnow.md · JSON https://www.anchorterminal.com/api/v1/tools/signnow.json

## Which one, for what

### Adobe Acrobat Sign (D)

Good for: A company that already holds Acrobat Sign Solutions and wants an agent to send agreements, track them by webhook and fetch signed files and audit trails.

Watch for: Adobe's SDK page says the C#, Java and JavaScript SDKs are obsolete and out of step with REST v6

### airSlate SignNow (B)

Good for: An agent that sends agreements from templates, embeds signing in another product or tracks invites, and teams that want per-invite pricing with a free test mode.

Ahead on:
- Reliability, 93 against 66
- Schema & documentation, 81 against 54
- Agent ergonomics, 66 against 55
- Payments & pricing, 35 against 25
- Maintenance & community, 72 against 10

Also in its favour:
- Runs on your own machine

Watch for: API keys don't expire and work for all API requests. Narrower access needs an OAuth token requested with a URL-pattern scope


## Score by category

| Category | Weight | Adobe Acrobat Sign | airSlate SignNow | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 66 | 93 | airSlate SignNow +27 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 54 | 81 | airSlate SignNow +27 |
| Agent ergonomics | 13% (16.2 this run) | 55 | 66 | airSlate SignNow +11 |
| Security & auth | 14% (17.5 this run) | 66 | 62 | Adobe Acrobat Sign +4 |
| Payments & pricing | 10% (12.5 this run) | 25 | 35 | airSlate SignNow +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 10 | 72 | airSlate SignNow +62 |
| Transparency & trust | 7% (8.8 this run) | 70 | 74 | airSlate SignNow +4 |
| Negative events | ≤15 | 0 | -2 | |
| **Total** | | **52.6 · D** | **68.5 · B** | |

## Facts side by side

| Fact | Adobe Acrobat Sign | airSlate SignNow |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Adobe Inc. | airSlate, Inc. |
| Hosted endpoint | `https://api.na1.adobesign.com/api/rest/v6` | `https://api.signnow.com` |
| Transports | HTTP | HTTP, Streamable HTTP, stdio |
| Auth | OAuth | OAuth or key |
| Pricing | Paid | Pay per use |
| x402 | no | no |
| Licence | Proprietary service under the Adobe General Terms of Use and, for enterprise customers, the Acrobat Sign product terms. The documentation and SDK repository on GitHub is MIT | Proprietary service under the SignNow Terms of Service. The MCP server and the SDKs on GitHub are MIT |
| Tools exposed | none | 21 |
| Read-only variant documented | no | yes |
| llms.txt | no | yes |
| MCP registry | not listed | `io.github.signnow/sn-mcp-server` |
| Last release | 2025-11-01 | 2026-09-03 |
| Terms last updated | couldn't be read | 2023-03-02 |
| Privacy policy last updated | 2025-10-24 | 2026-08-12 |
| Customer content may train models | couldn't be read | not found in the text |
| Terms restrict automated access | couldn't be read | yes |
| Terms restrict benchmarking | couldn't be read | yes |
| Terms or service can change without notice | couldn't be read | not found in the text |
| Arbitration or class-action waiver | couldn't be read | yes |
| Popularity | 26 stars | 8 stars, 7.7k npm/wk, 5.3k PyPI/wk |

## Verdicts

**Adobe Acrobat Sign.** The REST API has OAuth 2.0 scopes that can be limited to one user, a group or the account, `Retry-After` on throttled calls and a free Developer Edition. Adobe calls its own SDKs obsolete, the newest dated API change is November 2025, and API plans are sold through sales with no public price.

**airSlate SignNow.** The REST API has a public OpenAPI 3.0 spec with 354 operations, Markdown docs, a free Development mode with 500 invites and a hosted MCP server with OAuth. API keys don't expire and carry full account access, no idempotency keys were found, and the MCP server's GitHub repository was archived when checked on 7 October 2026.

## Before you call either

### Adobe Acrobat Sign

1. Call the base URI endpoint first and cache `api_access_point`. Each account lives on one shard such as `api.na1.adobesign.com`, and other hosts answer `INVALID_API_ACCESS_POINT`
2. Request only the scopes the task needs, with the `:self` modifier. `:account` lets the token act for every user in the account
3. On 429 wait the seconds in `Retry-After` or `retryAfter`. Retrying sooner resets the timer on accounts created after 20 May 2025
4. Don't poll. An identical GET repeated past the plan's threshold returns 429. Subscribe to webhooks, or send `If-None-Match` with the ETag
5. Create agreements in `DRAFT` state, check them, then move to `IN_PROCESS`. No idempotency key exists, so check before re-sending a failed `POST /agreements`

### airSlate SignNow

1. Call https://api.signnow.com with `Authorization: Bearer <API key or access token>`. Development and Live share this host, and Development documents carry a watermark
2. Request OAuth tokens with a narrow `scope` such as `document/* GET/user`. The default `*` grants every API action
3. Read `X-RateLimit-Remaining` and `X-RateLimit-Reset` on each response. The limit is 500 requests an hour in Development and 1,000 in Live, and 429 has no Retry-After
4. Check invite status before resending. No idempotency key exists, and a repeated invite call counts as another charged invite
5. Set `secret_key` when creating an event subscription and verify `X-SignNow-Signature` (HMAC SHA-256 of the body) on every callback

## Questions

### Which is better for AI agents, Adobe Acrobat Sign or airSlate SignNow?

airSlate SignNow scores 68.5 (B) on agent readiness against Adobe Acrobat Sign's 52.6 (D), and leads in 6 of 7 scored categories.

### Do Adobe Acrobat Sign and airSlate SignNow need an API key?

Adobe Acrobat Sign uses an OAuth sign-in. airSlate SignNow takes an API key or an OAuth sign-in.

### Can an agent call Adobe Acrobat Sign and airSlate SignNow without installing anything?

Yes. Adobe Acrobat Sign has a hosted endpoint at https://api.na1.adobesign.com/api/rest/v6 and airSlate SignNow at https://api.signnow.com.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/adobe-acrobat-sign-vs-signnow.json, and with the fewest tokens: https://www.anchorterminal.com/compare/adobe-acrobat-sign-vs-signnow.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "adobe-acrobat-sign", "b": "signnow"}`. From a terminal: `anchor compare adobe-acrobat-sign signnow`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/adobe-acrobat-sign.json and https://www.anchorterminal.com/api/v1/tools/signnow.json

## Other comparisons with Adobe Acrobat Sign or airSlate SignNow

- [Adobe Acrobat Sign vs Documenso](https://www.anchorterminal.com/compare/adobe-acrobat-sign-vs-documenso.md)
- [Adobe Acrobat Sign vs Docusign](https://www.anchorterminal.com/compare/adobe-acrobat-sign-vs-docusign.md)
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- [Documenso vs airSlate SignNow](https://www.anchorterminal.com/compare/documenso-vs-signnow.md)
- [Docusign vs airSlate SignNow](https://www.anchorterminal.com/compare/docusign-vs-signnow.md)
- [Dropbox Sign vs airSlate SignNow](https://www.anchorterminal.com/compare/dropbox-sign-vs-signnow.md)
- [PandaDoc vs airSlate SignNow](https://www.anchorterminal.com/compare/pandadoc-vs-signnow.md)