Side by side

OnSIP vs Xorcom CompletePBX

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.

OnSIP

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

Choose CompletePBX if you need a self-hosted PBX with call-center tools, Teams connectivity, and support for both VoIP and legacy interfaces. Look elsewhere if you need a free setup for more than three extensions or require pricing upfront.

Visit Xorcom CompletePBX

The facts

	OnSIP	Xorcom CompletePBX
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	Android, iPhone, Mac, Web, Windows	Android, iPhone, Linux, Self-hosted, Web
Lowest paid plan	Basic: $49.95 a month	Free or on request
Plans published	4	1
Maker	OnSIP	Xorcom CompletePBX
Website	onsip.com	xorcom.com
On business phone systems	#8 of 167	#12 of 167

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.

Xorcom CompletePBX: what it does well

Supports on-premise, data-center, and hosted self-deployment.
Combines VoIP with legacy telephony interfaces.
Includes call-center queues, monitoring, recording, and reporting.
Connects Microsoft Teams clients for calls, queues, and IVRs.
Offers granular calling permissions and multiple security controls.

What to know first

The free evaluation virtual machine is limited to three extensions.
Additional users require a purchased license.
Pricing is available on request.

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