Side by side
ShadowPBX vs Voxbi
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 APISelf-hosted
ShadowPBX offers broad telephony and dialing functions with self-hosted control and API access. The free MIT option removes feature gates, while managed tiers add hosted capacity and storage limits.
Visit ShadowPBX Free plan AndroidAPIiPhone+3
Voxbi offers a free entry plan and paid options with different calling, summary, history, and reporting allowances. Check per-minute charges and plan-specific conditions when choosing an option.
Visit VoxbiThe facts
| ShadowPBX | Voxbi | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Self-hosted | Android, API, iPhone, Mac, Web, Windows |
| Lowest paid plan | Business: $29 a month | Voxbi Starter: €1.20 a month |
| Plans published | 8 | 11 |
| Maker | Not published | Voxbi |
| Website | shadowpbx.com | voxbi.com |
| On business phone systems | #29 of 171 | #14 of 171 |
ShadowPBX: what it does well
- Open-source MIT-licensed project
- Supports queues, IVR, voicemail, and recording
- Connects existing SIP trunks
- REST APIs for telephony administration
- Self-hosted plan is free forever
What to know first
- Self-hosted deployment requires the user’s server
- Managed Starter limits five concurrent calls
- Managed plans charge monthly
Voxbi: what it does well
- Free plan includes three users and two phone numbers.
- Supports custom call routing and an automatic attendant.
- Available on web, desktop, and mobile platforms.
- Plus AI includes unlimited AI call summaries.
- Enterprise includes 730 days of call history.
What to know first
- Free plan includes only €0.70 monthly call credit.
- Calls are billed per minute on paid plans.
- Channel requires a minimum of three channels.
- Microsoft Teams costs +€50/month on Plus.
Alternatives to ShadowPBX Alternatives to Voxbi The whole list