Sellsy
CRM from first contact to invoice
What is Sellsy
Sellsy connects contact management, sales pipeline tracking, invoicing, and marketing automation inside a single platform. It's built for founders and RevOps leads at SMBs and mid-market companies who want one system to run from first prospect touch through to payment collection. The standout capability is AI-assisted call logging — calls are transcribed and summarized automatically, keeping records current without manual entry. Zapier connectivity and a public API mean you can wire Sellsy into broader stacks or trigger workflows from external events. Where it starts to strain is at the reporting layer — teams that need deep analytics or custom dashboards will likely need a separate BI tool alongside it.
Key features
system of record for contacts, deals, and pipeline
call transcription + summary
multi-step sequences, event-driven triggers
fits any iPaaS or workflow chain
Vanderbuild take
For a founder or RevOps lead at a growth-stage SMB who wants one system to run sales, billing, and customer records without stitching together five tools, Sellsy is a credible option in the CRM category. On the agentic readiness front, Sellsy sits at "Capable" — the public API and webhooks give you enough surface area to wrap it into your own MCP layer or drive it from an orchestration agent, though MCP server status is unconfirmed so you'll be building that bridge yourself. Pricing isn't publicly documented in a way we could verify, so budget conversations will need to happen directly with their team before you can model total cost. The honest limitation here is reporting depth — if your RevOps motion depends on slicing pipeline data in custom ways, you'll hit the ceiling of what Sellsy's native analytics can do and need to pipe data out to a BI layer.
Agentic stack profile
APIRESTProgrammatic access available.
REST API — straightforward to call from any agent or workflow tool. Rate limits and auth vary by plan.
API docs →Agentic readinessCapableSolid API access — wraps cleanly for agent use.
Solid REST or SDK access. No MCP server yet, but easy to wrap in custom agent tooling. Most modern SaaS tools land here.
Stack roleCRMWhere this tool slots into an agentic pipeline.
Plays the role of CRM in an agentic pipeline. Use it to be the system of record for contacts, deals, and pipeline.
Sellsy alternatives
Tools that solve a similar problem — compared at a glance.
- Best for
- RevOps, Founder
- Readiness
- Capable
- API
- REST
- Pricing
- Seat-based
- Budget
- $
- Best for
- RevOps, Founder
- Readiness
- Capable
- API
- REST
- Pricing
- Seat-based
- Budget
- $
- Best for
- RevOps, Founder
- Readiness
- Capable
- API
- REST
Frequently asked questions
Does Sellsy have a public API?
Yes — Sellsy ships a REST API. Docs: https://docs.sellsy.com/api/v2/.
Who is Sellsy best for?
Sellsy is built for RevOps, Founder. Fits SMB (1-50), Mid-market (50-500)-sized teams.
How well does Sellsy fit an agentic sales stack?
Tier: Capable. Solid public API, no MCP yet — straightforward to wrap in your own agent tooling.