Your agents work.
Now they can sign.
When your AI agents negotiate, procure, and commit — the deal still needs a signature. SumoSign gives them the legal standing to close, with the audit trail your business demands.
Audit exports and compliance controls built for enterprise security review.
Enterprise-grade evidence and controls.
Designed agent-first, not agent bolted on.
Category leaders set the evidence bar; most teams still bolt agents on as an afterthought. SumoSign meets the same regulatory and buyer expectations — then treats machine signers, webhooks, and high-volume automation as first-class citizens.
What mid-market teams pay per user, per month, once DocuSign's API access is included. DocuSign Business Pro + API tier, 2025 pricing.
Incumbents that ship delegated agent signing and agent-to-agent contracts as a first-class surface. DocuSign, Adobe Sign, HelloSign — none offer an agent auth model.
Projected agentic commerce market by 2035. Every deal still needs a signature. None have a legal layer yet. Next MSC agentic commerce report, 2026.
Of signing flows that should carry your brand — not locked behind a vendor add-on. DocuSign charges extra for custom branding on signing pages.
Branded signing pages
Your logo, your colors, your tone — client-facing quality that matches enterprise procurement expectations.
Custom signing domains
Recipients sign at sign.yourcompany.com so identity, TLS, and policy stay aligned with how you already run security.
Regulatory-ready evidence
Append-only audit log, certificate of completion, object-locked artifacts, and a counsel-friendly export — structured for review, not screenshots.
Agent-first, human-accountable
Scoped machine identities prepare, send, and sign under explicit authority — for people and for autonomous commerce as agent-to-agent rails mature.
Signing is where enterprise trust is won or lost.
Your recipient should feel your brand — and your controls.
The signing link is often the last touch in the sale and the first touch in the relationship. It is also the one screen most external recipients ever see. If it looks like a third-party portal from a vendor they have never heard of, your procurement story gets harder — not easier.
SumoSign is built around one rule: the sender owns the brand, the domain, and the signer experience. The recipient gets a clean, mobile-first flow on a host your security team already recognizes.
You get DocuSign-class evidence discipline and enterprise buyer polish — without routing every deal through someone else's domain strategy or agent roadmap.
Agent-first signing for people — and for machine commerce.
Delegated authority stays explicit in every audit line.
The same actions a human can take in the dashboard — create a document, place fields, add signers, send a request, check status, download a signed PDF, retrieve the audit trail, configure a webhook, manage branding — are available through scoped API keys. Idempotency keys are first-class. Webhooks are first-class. Status is pollable.
Audit events distinguish humans, integrations, recipient tokens, and delegated machine identities. Agents draft and route packets for their owners; where policy allows, they also sign under scoped credentials with the same evidentiary bar as a person. As payment networks add agent-to-agent rails (for example Stripe's agent commerce direction), agreements and counterparties need signing primitives that are API-native — not retrofitted PDF workflows.
Explore the APIYour questions, clearly answered.
SumoSign follows established e-sign frameworks (for example ESIGN and eIDAS-style evidence practices) used in regulated industries. Enforceability always depends on jurisdiction and document type; we concentrate on defensible signer identity, captured intent, and tamper-evident records your counsel can rely on.
Least-privilege roles, encryption in transit, scoped API and agent credentials, and append-only audit trails are table stakes for enterprise signing. Controls exist to support regulatory review and procurement questionnaires — not checkbox marketing.
Expect a direct cutover plan: map templates, recreate branding and domains, parallel-send a cohort, then shift volume. The goal is first-party signing without the enterprise procurement detour.
Teams that control DNS typically provision quickly, including verification. If IT batches changes, schedule the window — the steps themselves are documented.
Agents draft from templates, place fields, route envelopes, poll status, call webhooks, and archive outcomes. Where policy allows, explicitly scoped machine identities can sign on behalf of a person or organization — with the same audit granularity as a human actor. Delegation is never ambiguous in the trail: you always see who acted, under which credential, and when.
Published tiers cover most teams; Enterprise covers procurement, security review, custom limits, and dedicated rollout. Start from the pricing page and open a conversation when you need SSO, data residency, or volume commitments.
Signing should make your company look serious.
Roll out enterprise-grade envelopes, custom domains, and agent-ready APIs on infrastructure your security team can approve — without inheriting another vendor's brand or agent strategy.