OnSIP
VoIP providers
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
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$49.95 per month
Free TrialFree version
Small
Medium
Large
- Information technology and software
- Real estate and property management
- Media and communications
What is OnSIP
OnSIP is a cloud-based VoIP and hosted PBX service that provides business calling, SIP trunking, and softphone-based communications. It targets small to mid-sized organizations that need phone service with features such as auto attendants, ring groups, voicemail, and call routing. The product emphasizes standards-based SIP connectivity and offers both browser/desktop softphone options and support for compatible desk phones. It is typically used as a replacement for on-premises PBX systems or as a primary business phone system for distributed teams.
Standards-based SIP service
OnSIP is built around SIP, which supports interoperability with a wide range of IP phones, ATAs, and SIP-capable applications. This can reduce vendor lock-in compared with systems that rely heavily on proprietary endpoints or clients. It also supports common deployment patterns such as hosted PBX and SIP trunking for existing phone systems.
Core PBX calling features
The service includes foundational business telephony capabilities such as auto attendants, call queues/ring groups, voicemail, and call routing. These features cover many common needs for small offices and distributed teams without requiring on-premises PBX hardware. Administration is typically handled through a web portal for managing users, numbers, and call flows.
Softphone and device flexibility
OnSIP supports softphone-based calling and can be used with compatible SIP desk phones, enabling mixed device environments. This flexibility helps organizations standardize on one calling service while accommodating different user preferences and roles. It can be useful for teams that want to provision users quickly without shipping hardware to every location.
Limited contact-center depth
OnSIP is primarily positioned as a business phone system rather than a full-featured contact center platform. Organizations that require advanced workforce management, sophisticated omnichannel routing, or deep quality management may need additional tools or a different class of solution. This can increase integration and operational complexity for larger support or sales operations.
Integrations vary by stack
VoIP deployments often depend on CRM/helpdesk integrations, call logging, and workflow automation, and coverage can vary by vendor and plan. If a team relies on specific business applications, it may need to validate integration options and any associated middleware or API work. This is especially relevant for teams that expect turnkey integrations comparable to more tightly packaged communications suites.
SIP setup can be technical
While SIP interoperability is a strength, configuring SIP endpoints, NAT/firewall settings, and E911/location requirements can require telecom/network expertise. Organizations without in-house IT may need implementation support to avoid call quality and provisioning issues. This can lengthen rollout time compared with more prescriptive, device-managed offerings.
Plan & Pricing
| Plan | Price | Key features & notes |
|---|---|---|
| Free | $0 / month | Up to 100 users; unlimited internal extensions; free SIP-to-SIP and web voice/video calling; developer APIs; integrations (Zendesk, HubSpot, Odoo); can register SIP addresses on devices/apps. See OnSIP "Get OnSIP" page for details. |
| Basic (Pay-as-you-go) | $49.95 / month (per account) | Flat monthly feature fee of $49.95; calling minutes and messaging not included (pay-as-you-go calling at standard calling rates — 3.2¢/min in Standard Calling Area); includes a limited set of features (e.g., 1 Announcement, 3 Auto Attendants, 1 Call Recording user, limited voicemail boxes). |
| Unlimited | $18.95 / month per user (minimum 5 users) | Per-user unlimited plan that includes unlimited standard-area calling, unlimited instances of many PBX features (auto attendants, ring groups, call recording users, voicemail-to-email, call parking), VoIP phones included (per pricing page); SMS/MMS allotment (250/account) with 1¢ overage. |
Notable add-on / per-item rates (selected, official site):
- Phone numbers (DID): $2.00 / month / number.
- Porting fee: $15 per DID + $2.00 / month / number.
- Call recording: $4.95 / month / user.
- Announcements: $4.95 / month / announcement.
- Auto Attendant Menu: $19.95 (one-time or monthly listed).
- Busy Lamp Field: $19.95 / month.
- Call Parking Lots: $14.95 / month for 15 channels.
- E911: $1.80 / month / user.
- Standard calling rate (Basic plan): 3.2¢ / minute (Standard Calling Area). (These and other itemized feature rates are published on OnSIP's official pricing/features pages.)
Seller details
OnSIP
New York, New York, United States
2004
Private
https://www.onsip.com/
https://x.com/onsip
https://www.linkedin.com/company/onsip
