Pricing.
The SDK is MIT-licensed and free forever. Managed Cloud is in private preview while we finish automatic account and workspace provisioning.
- @e-sig/core, React UI, Supabase adapters
- @e-sig/mcp — MCP server for agent-driven signing (in-repo at packages/esig-mcp)
- PKCS#7 + RFC-3161 + PAdES
- Post-quantum seal — ML-DSA-65 (FIPS 204)
- Multi-signer envelopes
- Tamper-evident audit hash-chain
- Filesystem adapters — zero services
- Community support (GitHub Discussions)
- No warranty, no SLA
- 100 envelopes/mo · 1 user
- Managed Postgres audit chain
- S3 storage + verify page
- Postmark email (at cost)
- REST API + TypeScript SDK
- Webhooks, tokenized links
- $0.20/envelope overage
- Email support · 2-business-day response
- Founding preview may start at $19/mo for 90 days · best effort
- 500 envelopes/mo · 5 users
- Everything in Starter
- Higher rate limits (300 req/min)
- Custom subdomain
- $0.20/envelope overage
- Priority email · 1-business-day response
- Founding preview may start at $49/mo for 90 days · best effort
- 1,500 envelopes/mo · 15 users
- Everything in Team
- 1,000 req/min rate limit
- Priority queue on signing
- $0.20/envelope overage
- Priority email · 8-business-hour response
- Founding preview may start at $79/mo for 90 days · best effort
- Priority email + Slack Connect · 8-business-hour response
- Signed commercial invoice + W-9 + insurance certificate
- Security questionnaire responses, DPA, W-9, and insurance certificate on request
- Quarterly security patches · 90-day breaking-change notice
- DPA and BAA available
- Published MIT adapters — @e-sig/hsm-pkcs11 (PKCS#11 / CloudHSM / YubiHSM) and @e-sig/worm (S3 Object-Lock archival)
- SSO/SAML and LDAP audit sink available on request
- Named contact — a founder, not a queue
- Dedicated Postgres, auth, storage namespace, and API credentials
- Customer-specific KMS key, private versioned S3, queue + DLQ
- Deterministic, resumable infrastructure provisioning
- Signed order form, DPA, and scoped support policy
- SSO, HIPAA, HSM, WORM, private networking, and enhanced SLA quoted separately
- Custom integrations and usage above contract limits are not included
Tell us what you need.
Choose an offer, share the shape of your rollout, and we will follow up when the right provisioning path is ready. This is a request for access—not checkout.
Choose an offer in the form.
No card details. No subscription. No promise of access.
Vertical add-ons
Available on Business and Dedicated Cloud. Priced separately so they never inflate the base — turn on the ones you need, leave the rest off.
| Add-on | Monthly | Who buys it | |
|---|---|---|---|
| HIPAA BAA + Healthcare Runbook | $500 / mo | Clinical trials, EHR, telehealth | Contact sales → |
| HSM Signer (PKCS#11) | $800 / mo | Regulated finance, notary, government | Contact sales → |
| eIDAS QES Integration | $1,500 / mo | EU legal, real-estate, insurance | Contact sales → |
| 21 CFR Part 11 | $1,200 / mo | Pharma, medical devices | Contact sales → |
| UUAID Enterprise (agent-signed docs) | $500 / mo | AI agent platforms | Contact sales → |
| WORM Archival (Object-Lock) | $300 / mo | SEC / FINRA, legal discovery | Contact sales → |
How we price vs the market
| Provider | Entry paid | Volume plan | Overage / env | Self-host? | License |
|---|---|---|---|---|---|
| e-sig Cloud (preview) | planned $79/mo (100 env) | planned $499/mo (1,500 env) | target $0.20 | Yes, free | MIT |
| DocuSign | $10/mo (5 env) | $40/user/mo | $2.00–$4.00 | No | Closed |
| Dropbox Sign | $15/mo | $300/mo API | $1.00–$1.20 | No | Closed |
| BoldSign | $5/user/mo | $30/mo API (40 env) | $0.75 | No | Closed |
| PandaDoc API | $40/mo (40 docs) | Custom | $2.00–$4.00 | No | Closed |
| DocuSeal | $20/user/mo | Pro only | — | Yes | AGPL-3.0 |
| Documenso Cloud | $30/user/mo | $30/user/mo | — | Yes | AGPL-3.0 |
Comparison reflects publicly available offerings as of 2026 and is intended as guidance for procurement conversations. Check each vendor for current terms. See our legal notices.
Common questions
Why is the SDK free but the Cloud isn't?
The SDK is MIT and always will be. You pay us when you don't want to run Postgres, rotate certs, chase deliverability, and respond to auditors yourself.
Do I need Business if I self-host?
No. Business exists for teams whose procurement needs an invoice, a DPA, and a named contact. If you're a solo developer, self-host free.
What counts as an envelope?
One document, any number of signers. Same definition as DocuSign, BoldSign, Dropbox Sign. Verifications, downloads, and reminders are free.
What about SSO / SAML?
Available on Business and Dedicated Cloud. We don't put SSO behind a $50k+ tax — it's a $299/mo Business feature.
Is signing legally binding?
The signing path targets ESIGN and UETA in the US: intent (explicit consent), attribution (actor, IP, UA, cert fingerprint), integrity (PKCS#7 + optional RFC-3161 timestamp). You remain responsible for your own compliance review.
What are your uptime commitments?
Cloud is in private preview and has no paid SLA yet. Any uptime commitment will be published before checkout opens. Business and Dedicated Cloud commitments are defined in their signed agreements.