ADempiere vs Attio: Complete Comparison (2026)
An in-depth comparison of ADempiere and Attio to help you choose the right tool for your business.
Last updated: November 2026
ADempiere
6/10
ADempiere is a free, community-run, open-source (GPL v2) ERP suite with built-in CRM. It is for businesses that can host and customize their own systems.
Attio
6.9/10
Attio is an AI-native CRM with a flexible custom data model, email and calendar sync, and workflows, aimed at startups and relationship-driven sales teams.
Feature-by-Feature Comparison
| Feature | | |
|---|---|---|
| Scores | ||
| Overall Rating | 6/10 | 6.9/10 |
| Customization | 9/10 | 9/10 |
| Analytics | 6/10 | 6/10 |
| Integration | 5/10 | 6/10 |
| Support | 3/10 | 6/10 |
| Ease of Use | 3/10 | 8/10 |
| Security | 5/10 | 7/10 |
| Cost | 9/10 | 6/10 |
| Scalability | 6/10 | 6/10 |
| Pricing | ||
| Free plan | Yes | Yes |
| Cheapest paid plan | Contact for pricing | €39/user/mo Plus |
| Estimated cost for 10 users | Free Open Source (GPL v2) | €390/mo Plus |
| Features | ||
| Contact Management | ||
| Integrations | ||
| Reporting & Analytics | ||
| Collaboration | Not listed | |
| Customer Support Management | Not listed | |
| Lead Management | Not listed | |
| Mobile Access | Not listed | |
| Opportunity Management | Not listed | |
| Sales Automation | Not listed | |
ADempiere vs Attio cost by team size
| Team size | ADempiere | Attio |
|---|---|---|
| 1 user | FreeOpen Source (GPL v2) | FreeFree |
| 5 users | FreeOpen Source (GPL v2) | €195/moPlus |
| 10 users | FreeOpen Source (GPL v2) | €390/moPlus |
| 25 users | FreeOpen Source (GPL v2) | €2,325/moPro |
| 50 users | FreeOpen Source (GPL v2) | €4,650/moPro |
The plan that fits each team size, billed monthly, before add-ons and usage charges. Each cost opens that tool's pricing calculator for the team size.
Which One Should You Choose?
Why choose ADempiere
- Higher Cost score (9/10 vs 6/10)
Why choose Attio
- Higher Ease of Use score (8/10 vs 3/10)
- Higher Support score (6/10 vs 3/10)
- Better fit for startups (9/10 vs 4/10)
- Better fit for sales teams (7/10 vs 3/10)
Pros & Cons
ADempiere
Pros
- No licence fees or premium editions. All modules are free under GPL v2.
- CRM records share a database with orders, invoicing and accounting, so the full customer-to-cash history sits in one system.
- The active data dictionary lets administrators change windows, workflows and reports without modifying core code.
- Reviewers praise flexible reporting with drill-down, and Jasper Reports integration is available.
Cons
- Self-hosting, setup and customization require real technical expertise.
- Reviewers describe the user interface as dated.
- Support comes from the community and documentation. There is no vendor helpdesk or SLA.
- One reviewer reported login problems and a crash under heavy concurrent use, and the community-driven roadmap is hard to predict.
Attio
Pros
- The custom objects and attributes let teams model non-standard processes such as fundraising or partnerships.
- Email and calendar sync builds and enriches contact and company records automatically.
- A Free plan for up to 3 seats and transparent per-seat pricing make it easy to start.
- Pro call intelligence records Zoom, Meet and Teams calls and fills fields from transcripts.
- Developers get API access on every plan, plus webhooks, an App SDK and an MCP server.
Cons
- The native integration catalog is smaller than HubSpot's or Salesforce's.
- Mailbox sending caps make it unsuitable for high-volume outbound SDR teams.
- Plus stops at 10 seats, so the 11th seat forces an upgrade to Pro.
- AI features and workflows draw on credit pools that can run out.
- Reviews say the mobile app has fewer features than the web version, and some report inconsistent support.
Not sold on either?
Frequently Asked Questions
Attio scores higher on our CRM criteria: 6.9/10 against 6/10 for ADempiere. The largest gap is in Ease of Use: 3/10 for ADempiere and 8/10 for Attio.
Yes, both ADempiere and Attio have a free plan.
Attio is the better fit for startups: we rate it 9/10 for them, against 4/10 for ADempiere.
