All comparisons
Cannon VoIP vs. PortSIP
PortSIP PBX is PBX software that you install and run yourself, on your own server or cloud account. Buyers report a 300-license minimum purchase, so even a small office pays for 300 licenses, and you also need hosting, a SIP trunk carrier for numbers, calling, texting and 911, STIR/SHAKEN call signing through your carrier, and someone to install, patch and secure it. Cannon VoIP runs all of that for you for $34 an extension.
The short version
With Cannon VoIP$170 a month for 5 users, all-in, with unlimited texting, a CRM and a power dialer included.
With PortSIPAbout $455 to $570 a month over three years once you add the 300-license minimum, hosting, a carrier and admin time.
Feature check
Do we have more features than PortSIP?
For a small business that wants the whole system run for it, yes: we are the carrier, host and support team, and every extension includes a built-in CRM, an AI receptionist, call screening, a power dialer and fax. PortSIP is close on core calling and contact center features and is ahead on WhatsApp, sentiment analysis and running it on your own servers.
Included with us, not with PortSIP
- No carrier to bring. We provide the numbers, calling, texting and E911; PortSIP is software only, so those come from a SIP trunk provider you sign up with.
- Built-in CRM. People, deals, forms and automation are included; PortSIP connects to Zoho, HubSpot, Odoo and Salesforce but lists no CRM of its own.
- AI receptionist. Ours holds a real conversation and books appointments; PortSIP's Virtual Receptionist is a keypad menu, and a conversational AI receptionist is not listed on its site.
- Call screening. Callers state their name and reason before you answer; name-and-reason screening is not listed on PortSIP's site.
- Power dialer and cloud fax. Both are built in with us; neither is listed on PortSIP's site or in its documentation.
- Connect your own AI assistant. We support MCP assistants with approval controls; PortSIP offers REST APIs and webhooks, and an MCP connection is not listed on its site.
What PortSIP has that we don't
- WhatsApp messaging. PortSIP brings WhatsApp conversations, templates and media into its apps alongside SMS.
- Call sentiment analysis. PortSIP's AI flags calls by sentiment so supervisors can review the ones that need attention.
- Run it on your own servers. PortSIP runs on your own hardware or your AWS, Azure or Google Cloud account, giving you full control of the system and its data.
- Perpetual licenses and a free edition. PortSIP sells perpetual licenses (buyers report a 300-license minimum purchase) and has a free edition for up to 3 users and 2 simultaneous calls.
- Executive and assistant calling. PortSIP lets assistants handle calls on behalf of executives, with their own feature codes.
- More desk phone keys. PortSIP auto-provisions up to 200 busy lamp keys on an IP phone; we allow up to 20 keys per extension.
Software you run vs. a phone company that runs it.
PortSIP writes its own PBX software, but you or a partner host it and you bring your own carrier. Every $34 Cannon VoIP extension also includes things PortSIP does not list:
- Nothing to host, patch or connect. PortSIP is installed on your own servers or cloud account, and its guides cover installs, upgrades, backups and SSL certificates you manage.
- A carrier, numbers and 911. PortSIP sells software only; numbers, calling, texting and E911 come from a SIP trunk provider you sign up with separately.
- Built-in CRM. PortSIP connects to Zoho, HubSpot, Odoo and Salesforce but lists no CRM of its own.
- AI receptionist and call screening. A conversational AI receptionist and name-and-reason call screening are not listed on PortSIP's site; its Virtual Receptionist is a keypad menu.
- Power dialer and cloud fax. Neither is listed on PortSIP's site or in its documentation.
5-user scenario: what you'd actually pay per month
Cannon VoIP
$170/month
5 extensions × $34, all-in. No regulatory fee, no E911 fee, no support-tier fee: unlimited domestic calling and texting, AI call/voicemail transcription, and CRM integration all included, with a main number plus a direct number for every extension (6 numbers) in the price.
PortSIP
~$455 to $570/month
Invoices from two PortSIP buyers in summer 2026 show a minimum purchase of 300 licenses at about $2,500 per 100, so even 5 users start at about $7,500 up front, then 20% ($1,500) a year for updates and support after year one. That is about $292 a month averaged over three years, or $625 a month in year one. Hosting on a cloud server that meets PortSIP's smallest spec (4 vCPUs) is $48 a month at DigitalOcean. A Twilio SIP trunk adds 5 local numbers with E911 ($9.50) plus usage, about $9 to $30 a month. Admin time to install, patch, secure and back it up: we estimate 2 to 4 hours a month, about $95 to $190 at the US median pay for network and systems administrators ($47.66 an hour, Bureau of Labor Statistics). Total: about $455 to $570 a month over three years, and about $785 to $905 a month in year one. Carrier texting fees, 10DLC registration, outside AI transcription charges and phones are extra.
Moving from PortSIP is built in
Cannon VoIP has migration tools in the portal, and our team guides the move for free:
- How your setup comes across. Import straight from a PortSIP export, or paste or upload a spreadsheet of your extensions, names, emails and desk phones.
- Keep what your callers hear. Optional discovery calls ring your old system and record what its menus say, so the wording, or the original recordings, can come across.
- Nothing changes until you approve it. Review a plan with counts before anything is applied; an import report lists anything that could not come across.
- No gap in service. Your PortSIP service keeps taking calls until your numbers port, at $15 per line, usually the next business day.
Bottom line: Five users cost $170 a month at Cannon VoIP, all-in. With PortSIP, the 300-license minimum, a server, a SIP trunk and admin time come to about $455 to $570 a month over three years, and more in year one. PortSIP is strong PBX software with a real contact center, but you run it and bring the carrier; Cannon VoIP runs everything and adds a built-in CRM, AI receptionist, call screening, power dialer and fax to every $34 extension.
Want your own numbers? Get a free phone bill review: upload your current bill and see every fee, plus what the same setup costs with us.
Sources: where our PortSIP information comes from (28)
Each claim about PortSIP on this page is based on the public sources below, checked October 2026. Where PortSIP does not publish a price, we use independent pricing guides and say so. If something has changed, tell us at support@cannonvoip.com and we will correct it.
- Invoices from two PortSIP buyers, summer 2026 (on file with Cannon VoIP): 300-license minimum purchase at about $2,500 per 100 licenses, with the first year of updates and support included and 20% of the license price a year after that
- PortSIP pricing page: Licensed per extension with 1:1 simultaneous calls; all features in every license; perpetual and annual licenses; free edition 2 simultaneous calls and 3 extensions; no published prices (Get a quote); 24 x 7 support
- PortSIP PBX product page: Multi-tenant PBX for service providers; runs on your infrastructure or on Azure, AWS, GCE; Docker deployment; contact center with skill-based routing, live wallboards, call-back; AI transcription and sentiment analysis; SBC and Teams Direct Routing free; Microsoft 365 integration; REST APIs, webhooks, Pub/Sub
- PortSIP download page: Free edition allows up to 2 simultaneous calls and 3 extensions with all features
- Interbit PortSIP perpetual license price list (reseller, reported): First year of updates and technical support included; annual maintenance after year one is 20% of the perpetual license cost; late maintenance renewal not available
- PortSIP End-User License Agreement: Software not designed for emergency calls and does not support calls to 911; upgrades require a valid license and the applicable upgrade fee
- PortSIP hardware specifications: Smallest recommended server: 4 vCPUs (6 with recording), 4 GB memory, 100 GB disk (200 GB with recording)
- DigitalOcean Droplet pricing: Basic Droplet with 4 vCPUs, 8 GiB memory and 160 GiB disk at $48 a month, used for 5-user hosting cost
- Twilio Elastic SIP Trunking US pricing: Local numbers $1.15 a month; Emergency Calling $0.75 a month per number; termination from $0.0011 a minute; local origination $0.0034 a minute; used for 5-user carrier cost
- Twilio US SMS pricing: $0.0083 per SMS segment sent or received; carrier fees and A2P 10DLC registration fees extra
- Twilio A2P 10DLC brand registration: One-time 10DLC brand registration and vetting fees for business texting
- PortSIP installation guide: You install the PBX, its services and upgrades yourself on Linux with Docker
- PortSIP documentation index: Guides for SBC install, upgrades, backup and restore, SIP trunk setup; no fax, power dialer, website chat widget, call screening or MCP guides listed
- PortSIP SMS channel guide: SMS only through supported SIP trunk providers that you enable; requires a full-chain SSL certificate on your PBX
- PortSIP STIR/SHAKEN overview: Partners must obtain their own STIR/SHAKEN certificate
- PortSIP configuring STIR/SHAKEN: Signing outbound calls needs your own certificate, which requires an OCN telecom carrier code; inbound calls can be dropped by the verification status the trunk passes
- PortSIP Emergency Numbers API (v22.8): Emergency numbers are configured in the PBX, so 911 depends on your setup
- PortSIP CRM integrations guide: Integrations with Zoho, HubSpot and Odoo with click-to-call and call logging; no built-in CRM described
- PortSIP Virtual Receptionist guide: Virtual Receptionist is a keypad menu (press 1, press 2)
- PortSIP AI transcription guide: Call and voicemail transcription sent to an outside AI platform you configure; requires call recording
- PortSIP meetings guide: Video meetings with PIN and admin PIN
- Why Choose PortSIP PBX: Listen In, Whisper and Barge In for supervisors; SMS and WhatsApp Business API
- PortSIP PBX v22.5 release notes: Auto-provisioning up to 200 BLF keys on IP phones
- PortSIP PBX v22.6 release notes: WhatsApp templates and media, MMS; Selective Call Rejection and Acceptance
- PortSIP PBX v22.8 release notes: Salesforce CRM integration; Executive and Assistant call handling; emergency call handling update
- PortSIP: not built on Asterisk or FreeSWITCH: PortSIP writes its own PBX software, not based on an open source PBX
- PortSIP supported IP phones: Fanvil, Yealink, Snom, Grandstream, Gigaset, Avaya J and other supported phones
- US Bureau of Labor Statistics: network and computer systems administrators pay: Median pay of $47.66 an hour (May 2025), used with our estimate of 2 to 4 admin hours a month
Pricing, plan and feature details reflect PortSIP's publicly published information as of October 2026 and are subject to change. Confirm current pricing directly with PortSIP.
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