OneflowSmart contracts that feel like magic.
vs
SirionThe global leader in AI-native, enterprise-grade contract lifecycle management software.
Comparison · Proposals & Contracts · weekly run Nov 2
Oneflow vs Sirion
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Oneflow is the stronger AI pick in Proposals & Contracts: it has a visibility score of 16.1 versus 2.5 for Sirion, and ranks ahead in 100% of the answers that name both.
Choose Oneflow if…
- You want the brand AI engines rank higher (16.1 vs 2.5)
- AI answers describe it more positively (32% vs 0% positive)
- You need ISO 27001 or ISO 9001 or ISO 14001 or SOC 1 Type 1 or SOC 2 Type 1 coverage
- Dynamic, collaborative digital contracts that stay editable after sending
Choose Sirion if…
- 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 | Oneflow | Sirion |
|---|---|---|
| Visibility score | 16.1% | 2.5% |
| Change vs last week | New | New |
| Rank in Proposals & Contracts | #7 | #24 |
| Share of voice | 4.9% | 1% |
| Mentions this run | 27 | 5 |
| Positive in AI answers | 32% | 0% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Oneflow 0pp · Sirion 0pp over 0 weekly runs.
Engine by engine
Oneflow leads on 2 of 3 engines
ChatGPT
AI Mode
Perplexity
OneflowSirion
Head to head in AI answers
1 engine answers name both brands
1Oneflow ranked higher
0Sirion ranked higher
| Prompt | Engine | Oneflow | Sirion |
|---|---|---|---|
| What are the best Proposals & Contracts tools in 2026? | AI Mode | #6 | #8 |
Features, pricing & fit
| Dimension | Oneflow | Sirion |
|---|---|---|
| Deployment | SaaS | Cloud-based SaaS platform |
| Compliance | ISO 27001, ISO 9001, ISO 14001, SOC 1 Type 1, SOC 2 Type 1 | ISO 27001:2022, SOC 1 Type II, SOC 2 Type II |
| Support | Dedicated onboarding in the Enterprise tier | — |
| Founded | 2012 | 2012 |
| Headquarters | Stockholm, Sweden | Lehi, Utah, United States |
| Employees | 51–200 | 501–1,000 |
| Funding | Private investment of SEK 20 million from Mattias Ståhlgren | Series C |
| Best for | Teams of all shapes and sizes that need to handle their contracts | — |
Pros and cons
Themes from the AI answers that mention each brand
Oneflow
- Dynamic, collaborative digital contracts that stay editable after sending
- Live contract editing and negotiation, reducing email back-and-forth
- Free tier with basic contract management, comments, audit trails and dashboards
- Proposal-to-contract workflow turning interactive proposals into live contracts
- Strong for contract management, with online signing and post-signature tracking
- Interactive proposals and editable contracts require a paid plan
- Smaller review coverage and pricing generally targets larger teams
Sirion
- AI-native agentic contract automation
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Oneflow vs Sirion”, https://slateindex.ai/compare/oneflow-vs-sirion, data of Nov 2, 2026. Licence: CC BY 4.0.