Side by side
FreePBX vs OnSIP
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 AndroidiPhoneLinux+2
FreePBX provides a broad, free foundation for customized IP phone systems across self-hosted and other supported environments. Plan for installation resources and migration work when moving from an earlier version.
Visit FreePBX Free plan AndroidiPhoneMac+2
OnSIP offers a free tier alongside paid calling and business phone features. The restriction on regular-number dialing for free SIP accounts is an important distinction when choosing a plan.
Visit OnSIPThe facts
| FreePBX | OnSIP | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Android, iPhone, Linux, Self-hosted, Web | Android, iPhone, Mac, Web, Windows |
| Lowest paid plan | Free or on request | Basic: $49.95 a month |
| Plans published | 8 | 4 |
| Maker | Not published | OnSIP |
| Website | freepbx.org | onsip.com |
| On business phone systems | #4 of 167 | #8 of 167 |
FreePBX: what it does well
- Free to download and use
- Web GUI for managing Asterisk
- Advanced routing and voicemail transcription
- Open standards and SIP endpoint compatibility
- Community and paid support options
What to know first
- Version upgrades require fresh installation and data transfer
- Debian installation lists 2 GB RAM and 20 GB disk
- Commercial modules use separate licenses
OnSIP: what it does well
- Free plan supports up to 100 users.
- Free plan includes unlimited extensions.
- Integrations include Zendesk, HubSpot, and Odoo.
- Month-to-month contracts are available.
What to know first
- Free SIP accounts cannot dial regular phone numbers.
- Unlimited plan has a five-user minimum.
- Video conferences support up to five people.
Alternatives to FreePBX Alternatives to OnSIP The whole list