Side by side
OnSIP vs Slingshot VoIP
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 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 OnSIP Paid AndroidAPIiPhone+2
Slingshot VoIP combines virtual PBX features, business numbers, routing, transcription, and integrations across desktop and mobile platforms. Its paid plans differ by user count and included allowances, with a minimum 12-month term.
Visit Slingshot VoIPThe facts
| OnSIP | Slingshot VoIP | |
|---|---|---|
| Free plan | Yes | No |
| Open source | Not published | Not published |
| Runs on | Android, iPhone, Mac, Web, Windows | Android, API, iPhone, Mac, Windows |
| Lowest paid plan | Unlimited: $18.95 a month | Essential: $19.95 a month |
| Plans published | 4 | 4 |
| Maker | OnSIP | Not published |
| Website | onsip.com | slingshot.tel |
| On business phone systems | #8 of 174 | #115 of 174 |
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.
Slingshot VoIP: what it does well
- Unlimited US and Canada calling
- Advanced call routing
- Voicemail transcription included
- Microsoft Teams and Salesforce integrations
- Desktop and mobile apps
What to know first
- No free plan or trial
- Minimum 12-month pricing term
- Calls subject to fair usage policy
- Support hours limited to weekdays
Alternatives to OnSIP Alternatives to Slingshot VoIP The whole list