Upload a document, let AI find where to sign, and sign with your finger. Legally valid in the US under the ESIGN Act.
SignGo
Built for freelancers and small businesses who live on their phones.
Or snap a photo. Your document is ready in seconds.
PDF or image, up to 20 MB · unlimited pages
Signature and date fields are detected and placed for you.
Draw your signature on the screen and download the signed PDF.
The app adapts to your language automatically — English, Portuguese and Spanish today, more to come.
Every signature ships with a tamper-proof audit certificate embedded in the PDF — SHA-256 hash, IP address, and timestamps for every step.
Send a document to multiple signers by email. Each one signs from their phone, and everyone receives the final signed PDF.
Real people, not bots. Get hands-on help for US$5 per session — available on every plan.
7-day free trial on every plan (up to 3 signed documents). Cancel anytime.
Need a hand? Human technical support is available on every plan for US$5 per session.
Yes. SignGo follows the US ESIGN Act and UETA: consent, identity binding and a complete audit trail with every signature.
No. The 7-day trial is free and you can cancel anytime.
Yes. SignGo runs in the browser — nothing to install, works on any modern phone.
Yes. Documents are encrypted in transit, visible only to you and your signers, and never used for anything else.
Each file can be up to 20 MB — PDF, JPG or PNG — with no limit on the number of pages.
Use the help section in your account, or get hands-on human support for US$5 per session.