# BoldSign vs airSlate SignNow (slim)

> BoldSign scores 70.3 (BB) to airSlate SignNow's 66.3 (B) for e-signatures. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/boldsign-vs-signnow.md (~3,700 tokens) · this version ~1,930 tokens · JSON https://www.anchorterminal.com/compare/boldsign-vs-signnow.json · canonical https://www.anchorterminal.com/compare/boldsign-vs-signnow
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-04
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

BoldSign scores 70.3 (BB) on agent readiness against airSlate SignNow's 66.3 (B), and leads in 5 of 7 scored categories. airSlate SignNow leads on reliability. Both do e-signatures.

- BoldSign: BB 70.3, rank #190 of 1349 · https://www.anchorterminal.com/tools/boldsign.min.md
- airSlate SignNow: B 66.3, rank #340 of 1349 · https://www.anchorterminal.com/tools/signnow.min.md
- BoldSign, good for A product team embedding signing, requesting and templates at a per-envelope price with regional hosting in the US, EU, Canada or Australia, and an agent that sends from templates and tracks status through the hosted MCP server. Ahead on Payments & pricing, 40 against 35; Maintenance & community, 78 against 57. Also Agent-ready, a grade of BB or better; No incidents deducted, where airSlate SignNow loses 3 points for them.
- airSlate SignNow, 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 84. Also Runs on your own machine.

| Category | BoldSign | airSlate SignNow |
| --- | --- | --- |
| Reliability (16%) | 84 | 93 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 85 | 81 |
| Agent ergonomics (13%) | 62 | 66 |
| Security & auth (14%) | 63 | 62 |
| Payments & pricing (10%) | 40 | 35 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 78 | 57 |
| Transparency & trust (7%) | 77 | 75 |

| Fact (where they differ) | BoldSign | airSlate SignNow |
| --- | --- | --- |
| Vendor | Syncfusion, Inc. | airSlate, Inc. |
| Hosted endpoint | `https://api.boldsign.com/v1` | `https://api.signnow.com` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Pricing | Freemium | Pay per use |
| Price for e-signatures | $0.25 per transaction | not published |
| Licence | Proprietary hosted service under the BoldSign Terms of Use. The five official SDKs and the deprecated local MCP package on GitHub are MIT | Proprietary service under the SignNow Terms of Service. The MCP server and the SDKs on GitHub are MIT |
| Tools exposed | 14 | 21 |
| Read-only variant documented | no | yes |
| MCP registry | not listed | `io.github.signnow/sn-mcp-server` |
| Last release | 2026-10-16 | 2026-09-03 |
| Terms last updated | 2025-02-01 | 2023-03-02 |
| Privacy policy last updated | 2026-07-01 | 2026-08-12 |
| Popularity | 1 stars | 8 stars, 7.7k npm/wk, 5.3k PyPI/wk |
| Agent reviews | none | 3/5 (4) |

Why the edge:
- Maintenance & community, BoldSign +21: BoldSign 78 (Read as a closed service. The API changelog's newest entry is 16 October 2026, and the PHP SDK repository was pushed the same day, Java and Python on 13 October (30). Changelog entries on 13 August, 19 August, 7 September, 23 September, 8 October and 16 October 2026 (20). Support site, knowledge base and support@boldsign.com, with a public changelog. GitHub issues on the SDK repositories were not read (8 of 15). Five official SDKs, Node at 3.3.4 since August 2026. The hosted MCP server is not in the official MCP registry (15). The Node SDK clone shows no CI workflow and the deprecated MCP package stopped at 0.0.5 (5 of 10). 30 + 20 + 8 + 15 + 5 = 78.); airSlate SignNow 57 (The API changelog's newest entry is still September 2026, dated by month only, and the PHP SDK v3.5.4 (3 September 2026, a code change) is 59 days old, so both sit in the 90-day band (20). In the 90 days to 1 November the changelog has entries for August and September, and v3.5.4 counts half as an SDK release, which falls short of three, so half the line (10). Closed service with a monthly changelog and API support at api@signnow.com. The MCP repository that the docs name for issue reports was archived when checked on 7 October and has no commit after 27 July (8). SDKs for five languages, with PHP in September 2026, Python in April and Node in March per the 7 October check. The official MCP registry still lists io.github.signnow/sn-mcp-server at 0.3.1 while the newest tag is v3.1.0 (13). The MCP repository has CI with ruff, mypy and pytest and 60 test files, and it was archived when checked on 7 October (6).)
- Reliability, airSlate SignNow +9: BoldSign 84 (Read with the hosted lines and scored on the REST API v1, the surface the SDKs and the hosted MCP server call. status.boldsign.com on Atlassian Statuspage has Web App and API components for Global, Europe, Canada and Australia plus Docs, with 90-day uptime and an incident history (20). The history feed, read on 3 November 2026, lists four one-hour scheduled maintenances between 19 and 27 September and no incident after a 20-minute partial disruption on 21 July 2026, so the 90 days from 5 August are clean (30). Rate limits are published per account, 2,000 requests an hour live and 50 an hour in the sandbox (15). The rate-limit page says 429 is returned with messages and usage is tracked in response headers, and the guide recommends webhooks over polling. No Retry-After is documented and there are no idempotency keys (6 of 15). No SLA document was found. security.txt advertises a 99.999 per cent uptime SLA, the terms disclaim uninterrupted service and refer to a support SLA available on request (3 of 10). v1 is the stable version with beta endpoints under v1-beta (10). 20 + 30 + 15 + 6 + 3 + 10 = 84.); airSlate SignNow 93 (Graded as a hosted API. Statuspage at status.signnow.com with six components including API (20). The history feed shows one incident in the 90 days to 1 November, a minor one on 3 September 2026 that made the SignNow University site unavailable for eight minutes, and none on the API component. The 17 October maintenance window of up to 15 minutes was announced on 2 October (30). Limits are published with numbers, 500 requests an hour in Development and 1,000 in Live (15). 429 is documented with X-RateLimit-Limit, Remaining and Reset headers and advice to back off exponentially. No Retry-After header and no idempotency key were found, and sending an invite is a charged write (8). The SLA commits to commercially reasonable efforts for 99.9 per cent monthly uptime with credits of 10 or 30 per cent (10). The REST API is generally available (10).)
- Payments & pricing, BoldSign +5: BoldSign 40 (Read with the hosted rubric. No x402, MPP or L402 (0). The Enterprise API plan is public at $30 a month with 40 envelopes and $0.75 per additional envelope, and add-ons are priced per unit (20). The free sandbox gives full API access with no credit card, and the 30-day trial also needs no card per the pricing page (20). A person signs up in a browser and mints the key or registers the OAuth app in the web app (0). 0 + 20 + 20 + 0 = 40.); airSlate SignNow 35 (No x402, MPP or L402 found (0). The developers page states per-invite prices, from $2 at 500 invites to $1.20 at 5,000. The full plan table is a JavaScript page we couldn't read, so we scored between plan-only and per-unit (15). Development mode is free with up to 500 invites, and the help centre says the free trial needs no credit card (20). A person has to register in a browser and verify an email address before the first key exists (0).)