Side by side
FusionPBX vs Issabel
Both stand on business phone systems. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxSelf-hosted+1
FusionPBX provides a broad, self-hosted communications platform with PBX, call-center, voicemail, and browser-calling functions. Memberships add applications and support, but paid plans carry annual commitments.
Visit FusionPBX
Free plan AndroidAPILinux+2
Issabel provides a broad open-source communications platform with PBX, contact-center, and integration features. The free core supports several deployment models, while paid modules and support add costs and the older Community Contact Center is no longer maintained.
Visit IssabelThe facts
| FusionPBX | Issabel | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Linux, Self-hosted, Web | Android, API, Linux, Self-hosted, Web |
| Lowest paid plan | Green Membership: $100 a month | See the plans |
| Plans published | 4 | 6 |
| Maker | Not published | Issabel |
| Website | fusionpbx.com | issabel.com |
| On business phone systems | #19 of 167 | #15 of 167 |
FusionPBX: what it does well
- Free open-source communication platform
- Supports multi-tenant deployments
- Unlimited extensions are described
- Includes WebRTC browser calling
- Provides extensive PBX and call-center features
What to know first
- CentOS 7 installation is out of date
- Paid memberships require a one-year commitment
- Green membership includes no support hours
- JSON REST API requires Purple or Gold membership
Issabel: what it does well
- Open-source core under GPL licenses
- Custom call routing and IP PBX
- Cloud and self-hosted deployment options
- Contact-center campaigns and monitoring
- APIs, webhooks, and AI integrations
What to know first
- Support, maintenance, and training may cost extra
- Community Contact Center is unsupported
- Agent licenses have minimum counts
- Some listed services carry separate fees
Alternatives to FusionPBX Alternatives to Issabel The whole list