Built for usage and agentsPer-seat, human-firstMCP = native agent protocol (Model Context Protocol)
| Provider | Pricing model | Seat minimum | Send limits | Entry cost | API | Agent-nativeMCP · prep from chat |
|---|---|---|---|---|---|---|
| AtlasThis is us | Usage-based | None | Unlimited | $1 / envelope | Yes | ✓ MCP-native |
| Roger Sign | Usage-based | None | Unlimited | $3-4 / contract | Yes | No |
| Proof(Notarize) | Usage-based | None | Unlimited | $4 / transaction | Yes | No |
| BoldSign | Seat or API | 1 user | 40-50 / mo | $5/user · $30 API | Yes | No |
| DocuSeal | Seat or API | 1 user | Unlimited | $20/user · $0.20/doc | Yes | No |
| airSlate SignNow | Seat or API | 1 user | Unlimited | $8/user · $1.50/invite | Yes | No |
| DocuSign | Per-seat | 1 user | 5/mo to 100/yr | $10 to $25/user | Yes | No |
| Dropbox Sign | Per-seat | 1-2 users | Unlimited | $15 to $25/user | Yes | No |
| PandaDoc | Per-seat | 1 user | Unlimited | $19 to $49/user | Yes | No |
| Adobe Acrobat Sign | Per-seat | 1 user | Subject to use | $16.99/user | Yes | No |
| Box Sign | Per-seat | 3 users ($60/mo) | Unlimited | $20/user | Yes | No |
| Foxit eSign | Per-seat | 1-5 users | 250 / yr | $10/mo | Yes | No |
| Signeasy | Per-seat | 1 user | 5/mo, then unlimited | $10 to $20/user | Yes | No |
| SignWell | Per-seat | 1 user | Unlimited | $12/mo | Yes | No |
| Sign.com | Per-seat | 1 user | Unlimited | $7/mo | Limited | No |
| Signaturely | Per-seat | 1 user | 5/mo, then unlimited | $25 to $50/user | Limited | No |
A seat nobody sits in
Per-seat pricing assumes someone on your team opens the product and hits send. When signing runs from an agent, that seat stays empty and the bill does not.
Atlas charges per envelope, not per login. Agents draft from Claude, ChatGPT, Cursor, or the API. They return a review link with detected fields and signer rows. A human clicks Send on that page before any signer gets email.
That review step is not a workaround. Legal buyers want eyes on the envelope before it goes out. Atlas keeps the agent in the loop for prep and polling, and keeps the human on Send.
Sending agreements from your stack?
Start free with 5 envelopes. $1 per send after. No credit card.