DocumensoThe Open Source DocuSign Alternative
vs
SirionThe global leader in AI-native, enterprise-grade contract lifecycle management software.
Comparison · Proposals & Contracts · weekly run Nov 2
Documenso vs Sirion
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Sirion is the stronger AI pick in Proposals & Contracts: it has a visibility score of 2.5 versus 0 for Documenso.
Choose Documenso if…
- You need a self-hosted or on-premises option
- You need U.S. ESIGN Act or UETA or eIDAS SES or 21 CFR Part 11 or SOC 2 or HIPAA coverage
Choose Sirion if…
- You want the brand AI engines rank higher (2.5 vs 0)
- You need ISO 27001:2022 or SOC 1 Type II or SOC 2 Type II coverage
- You prefer a larger, established vendor (501–1,000 employees)
- AI-native agentic contract automation
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Documenso | Sirion |
|---|---|---|
| Visibility score | 0% | 2.5% |
| Change vs last week | New | New |
| Rank in Proposals & Contracts | #48 | #24 |
| Share of voice | 0% | 1% |
| Mentions this run | 0 | 5 |
| Positive in AI answers | — | 0% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Documenso 0pp · Sirion 0pp over 0 weekly runs.
Engine by engine
Sirion leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
DocumensoSirion
Head to head in AI answers
0 engine answers name both brands
0Documenso ranked higher
0Sirion ranked higher
Features, pricing & fit
| Dimension | Documenso | Sirion |
|---|---|---|
| Pricing model | Flat tiers | — |
| Entry price | Free; paid from $25 / mo | — |
| Free plan | Yes | — |
| Deployment | Hosted by Documenso or self-hosted on the customer's own infrastructure | Cloud-based SaaS platform |
| Compliance | U.S. ESIGN Act, UETA, eIDAS SES, 21 CFR Part 11, SOC 2, HIPAA | ISO 27001:2022, SOC 1 Type II, SOC 2 Type II |
| Support | Email support, Slack integration support on the Platform plan, Enterprise support under a custom offer | — |
| Founded | 2019 | 2012 |
| Headquarters | San Francisco, California, USA | Lehi, Utah, United States |
| Employees | 1–10 | 501–1,000 |
| Funding | Pre-seed/seed, lead OSS Capital · $2M raised | Series C |
| Best for | Individuals, teams and software builders who want open source, self-hostable e-signatures | — |
Plans side by side
Documenso
Free$0month
Individual$25month, billed yearly ($300/year)
Teams$40month, billed yearly ($480/year), includes 5 users
Platform$250month, billed yearly ($3,000/year)
EnterpriseCustomcustom
Sirion
Pricing not available.
Pros and cons
Themes from the AI answers that mention each brand
Documenso
Profile in progress.
Sirion
- AI-native agentic contract automation
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Documenso vs Sirion”, https://slateindex.ai/compare/documenso-vs-sirion, data of Nov 2, 2026. Licence: CC BY 4.0.