OnSIP vs RingCentral (2026): which should you pick?

Pick OnSIP if

• Fits if you run a small office of five or more in the U.S. or Canada and want desk phones in the price
• Works for teams that already own SIP phones and would rather pay per feature

Look elsewhere if

• Skip it if you have fewer than 5 users, because Unlimited has a 5-user minimum
• Not for you if you are outside the U.S. and Canada, which the sign-up page says it does not serve
• Pricey if you need recording or queues, at $4.95 and $14.95 per user a month on top
• Watch out: E911 is $1.80 per user a month and each extra number is $2.00
• Watch out: there is no free plan and no trial

Pick RingCentral if

• Fits if you want calls, fax, meetings and chat from one company on one bill
• Works for Microsoft Teams shops that want RingCentral calling inside Teams

Look elsewhere if

• Tight if you text customers a lot, with 25 texts a person a month on Core
• Pricey if you add the extras: AI Receptionist from $39, SMS Booster $25, Call Queues Booster $35
• Not for you if you want to try texting first, since it isn't in the free trial
• Tight if you want calls recorded automatically or logged in a CRM, as both need Advanced at $25
• Watch out: listed prices are for 1-5 users, they change for 6-100, and texting needs TCR registration that may carry fees

OnSIP

• Unlimited needs at least 5 users; the Pay-as-you-go plan does not include calling minutes.
• Many features are paid add-ons: call recording is $4.95 per user a month and enhanced queues $14.95 per user a month.
• E911 is $1.80 per user a month and each extra phone number is $2.00 a month.
• The sign-up page says OnSIP does not service locations outside the U.S. and Canada.

RingCentral

• The listed prices are for 1-5 users; the page switches to other prices for 6-100 users, and 100+ users must contact sales.
• Automatic call recording and CRM integrations need Advanced; Core records calls on demand only.
• Add-ons are extra: AI Receptionist from $39, Business SMS Booster $25 and Call Queues Booster $35, as shown on the pricing page.
• Texting needs TCR registration, which may carry fees, and is not available during the free trial.

OnSIP

Call handling

Auto attendants, business-hour rules, ring groups, call parking, transfers, call screening and a dial-by-name directory.

Call center options

ACD queues, live queue dashboard, historical reporting, and monitor, whisper and barge, with queue features priced per user.

SMS and MMS

Business texting from your number in the apps; the Unlimited plan includes 250 messages per account, with 1 cent overage.

Apps and phones

Softphone apps for Mac, Windows, Linux, iOS and Android, a browser app, and any SIP-enabled device.

Integrations

Connections to HubSpot, Zendesk and Odoo, a Chrome extension, and an open API.

Month-to-month terms

The site describes month-to-month contracts with onboarding included, and lists each add-on feature with its own rate.

RingCentral

Calling and numbers

Unlimited calling within the US and Canada. The plan includes one company number; each extra local or toll-free number costs $4.99 a month.

Business texting

Texts from the business number: 25 per user a month on Core, 100 on Advanced and 200 on Ultra and the bundle. SMS needs carrier (TCR) registration first.

Call menus and routing

Multi-level phone menus, call queues and rules by business hours or availability, managed for several locations from one admin portal.

Video meetings, chat and fax

The same app runs video meetings for up to 300 people, team messaging with file sharing, and fax from the business number.

AI assistant

Included at no extra cost: real-time call and meeting notes, transcription, meeting summaries, and help writing and translating messages.

AI Receptionist

Answers calls around the clock, handles FAQs, books appointments and routes callers to staff. An add-on starting at $39, included in the AI Customer Engagement Bundle.

OnSIP

• Unlimited$18.95

  per user / month, 5-user minimum

  Unlimited standard calling, VoIP phones included, unlimited auto attendants, ring groups and recording users.

• Pay-as-you-go$49.95

  per month for the account

  For low call volume: calling billed at 3.2 cents a minute, 1 auto attendant, 3 recording users, inbound SMS and MMS.

RingCentral

• Core$20

  per user / month, billed annually ($30 billed monthly)

  Price for 1-5 users. Unlimited US and Canada calling, on-demand call recording, 100 toll-free minutes, 25 texts per user a month, 300-person meetings and MCP connectors.

• Advanced$25

  per user / month, billed annually ($35 billed monthly)

  Price for 1-5 users. Adds CRM integrations, multiple sites, automatic call recording, reports, 1,000 toll-free minutes and 100 texts per user a month.

• Ultra$35

  per user / month, billed annually ($45 billed monthly)

  Price for 1-5 users. Adds 10,000 toll-free minutes, 200 texts per user a month, RingCentral Webinar, historical and real-time insights and unlimited storage.

• AI Customer Engagement BundleCustom

  Everything in Ultra plus AI Receptionist, AI Conversation Expert call scoring and coaching, automatic call summaries and the SMS and call queue boosters.

OnSIP

No public discounts listed.

RingCentral

• Annual discount

  Save up to 33% by paying annually

  The pricing page lists Core at $20 per user a month billed annually against $30 billed monthly, Advanced at $25 against $35, and Ultra at $35 against $45.