Attio vs Sellsy
Short version: Attio is the better fit for startups and product-led teams that want a flexible, modern CRM, while Sellsy is built for French SMBs that want CRM plus invoicing and billing together.
Attio
Flexible, data-native CRM for modern teams
Free plan
Free plan; paid from ~$29/seat/mo (Plus/Pro tiers)
Sellsy
French all-in-one CRM, billing & marketing
$29/mo
From ~€29/seat/mo; CRM + invoicing + marketing suite
At a glance
| Spec | Attio | Sellsy |
|---|---|---|
| Starting price | Free plan | $29/mo |
| Budget tier | Budget-friendly | Mid-range |
| Complexity | Intermediate | Intermediate |
| Primary category | CRM | CRM |
| Integrations | 50+ | 50+ |
| Founded | 2019 | 2009 |
Feature comparison
Attio offers 8 of 11 tracked crm features; Sellsy offers 8.
| Feature | Attio | Sellsy |
|---|---|---|
| Visual pipeline management | ||
| Contact & company records | ||
| Email sync & tracking | ||
| Workflow automation | ||
| Reporting & dashboards | ||
| Built-in dialer | ||
| Sales forecasting | ||
| Mobile app | ||
| Free plan | ||
| API & webhooks | ||
| Priority / 24-7 support |
Attio
Pros
- Extremely flexible data model and slick UI
- Real-time enrichment and email/calendar sync
- Strong free tier and quick to customize
Cons
- Younger ecosystem, fewer native integrations
- Forecasting and sales reporting still maturing
- Best for teams comfortable building workflows
Sellsy
Pros
- CRM, quotes, and invoicing in one French suite
- French accounting and compliance native
- Good value for SMBs
Cons
- Mostly relevant to the French market
- Less customizable than Salesforce
- Smaller integration catalog
Which should you choose?
Choose Attio if…
- you want extremely flexible data model and slick UI
- you want real-time enrichment and email/calendar sync
- you want strong free tier and quick to customize
Choose Sellsy if…
- you want CRM, quotes, and invoicing in one French suite
- you want French accounting and compliance native
- you want good value for SMBs
The verdict
Both are solid crm tools. The best choice comes down to fit: Attio for startups and product-led teams that want a flexible, modern CRM, and Sellsy for French SMBs that want CRM plus invoicing and billing together.
Browse all tools →Frequently asked questions
Is Attio or Sellsy cheaper?
Attio is the more affordable option (Free plan versus $29/mo). The lower sticker price isn't always the better value, though, weigh the tier your team will actually land on and any add-ons.
Which is better, Attio or Sellsy?
Neither is strictly better, they're built for different priorities. Attio is the stronger pick for startups and product-led teams that want a flexible, modern CRM, while Sellsy suits French SMBs that want CRM plus invoicing and billing together.
What's the main difference between Attio and Sellsy?
Attio is intermediate and budget-friendly, while Sellsy is intermediate and mid-range. On tracked crm features, Attio covers 8 and Sellsy covers 8.