E-signature API pricing · 25¢ per envelope · No monthly fee
Get your API key. 25 documents free, no card, before e-signature API pricing applies at all. After that it's 25¢ per envelope at every volume, flat, sent by email and text in one call.
25 documents free. No card needed.
Check your email
We sent a sign-in link to . It is good for 15 minutes, and your API key is waiting on the other side.
Two signers on one document is still one envelope. Text and email to the same signer is still one envelope. The first 25 are free once, not every month. Nothing here is stored or sent anywhere.
| Envelopes in a month | What you pay | Monthly fee | Seats |
|---|---|---|---|
| 100 | $25.00 | $0 | $0 |
| 1,000 | $250.00 | $0 | $0 |
| 10,000 | $2,500.00 | $0 | $0 |
| 0 | $0.00 | $0 | $0 |
One rate at every volume. There is no tier to graduate into and no rate to negotiate, so the row you are on today is the row you are on at ten times the traffic.
One envelope is one document out the door, by email, by text, or by both at once, with a signed PDF and a certificate coming back.
Put ^S1 where the signature goes and ^D1 where the date goes, in white text. Invisible to the reader, findable by us.
One JSON request with the file and the signer. Delivery by email, text or both starts immediately.
envelope.completed lands on your endpoint with a link to the signed PDF and its certificate.
| What | Siglio |
|---|---|
| Per envelope | 25¢ |
| Monthly fee | $0 |
| Per seat | $0 |
| Minimum | $0 |
| SMS delivery | Included, same 25¢ |
| Free trial | 25 documents free, no card |
You are billed when an envelope is created, not when it is signed. A declined or ignored envelope still costs 25¢.
No. A month where you send nothing costs nothing. There is no platform fee, no seat fee and no annual commitment to sign.
No. Email, text, or both in parallel is the same 25¢. It is a delivery choice on the envelope, not an add-on with its own rate.
When an envelope is created, not when it is signed. If your signer declines, ignores it, or you void it, it still cost 25¢. We would rather you read that here than discover it on an invoice.
No, and that is the point. There are no tiers, no negotiated rates and no annual commit, so the rate you can quote your own customers today is the rate at ten times the traffic.
Everything. Free trial documents deliver to real inboxes and real phones, carry a real signature, and return a real signed PDF. No card is required to get them.
Yes. Your account carries a spend cap you set yourself, and envelopes stop rather than run past it.
25 envelopes, no card, real delivery. If the price works, add a card later and keep the same integration.
25 documents free. No card needed.
Check your email
We sent a sign-in link to . It is good for 15 minutes, and your API key is waiting on the other side.
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