Give your agent one API key and llms.txt — it prepares, sends, and tracks on AWS-hosted infrastructure.
DocuSign alternative
Enterprise signing without the enterprise portal tax.
SumoSign matches the category on evidence, controls, and buyer-facing polish, then adds an agent-operable API and real multi-party routing — so teams that send a lot of contracts look premium without enterprise pricing.
Last updated: July 4, 2026
Multi-party envelopes with parallel or sequential routing and one audit trail.
Transparent flat tiers plus Enterprise from $799 for procurement, SSO, custom domains, and custom commitments.
Key takeaways
At a glance
- Enterprise-grade evidence and controls without the per-seat and per-envelope tax of legacy portals.
- Premium branded signing with real multi-party routing and one audit trail per envelope.
- Agent-native API and MCP so your workflow automates prepare, send, and track — humans still sign.