OnSIP vs Zadarma (2026): which should you pick?
As of Nov 13, 2026, Zadarma grades higher than OnSIP: 3.2 against 2.0 out of 4.0.
Checked Nov 12, 2026 · graded Nov 12, 2026 and Nov 13, 2026 by ToolGPA
Zadarma grades higher on value for money, the free plan and features. They get the same grade on ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Zadarma
Cloud PBX and virtual numbers in 110+ countries, free to start
Which one is for you
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 Zadarma if
- Fits if you run a team of up to 5 and want a PBX without a monthly fee
- Works for businesses that want numbers in many countries on one account
Look elsewhere if
- Tight if you need minutes included, because Standard includes none and charges calls and numbers separately
- Watch out: prices depend on the region selector, and the figures here are the page's default World region
- Watch out: annual prices need yearly payment and plans cap users at 5, 10 or 20
- Skip it if you use Linux, since the calling apps page lists no Linux app
How we grade them
| 2.0GPAOnSIPFair | 3.2GPAZadarmaVery good | |
|---|---|---|
| Value for money | C$18.95 per user a month with a 5-user minimum, against a category middle of $19. The $49.95 pay-as-you-go account bills calls at 3.2 cents a minute on top. | AOffice is $39 a month for 10 users, about $3.90 a user, under half of the $8.40 that is 60% of the $14 where business-phone tools start. The Standard plan itself is $0. |
| Free plan and trial | FNo free plan and no trial on record. The listing shows only the paid Unlimited and Pay-as-you-go accounts. | BStandard is $0 a month for up to 5 users with the PBX features, and one person could live on it. Calls, numbers and some extra PBX features are paid for as used. |
| Features | CAuto attendants, ring groups, ACD queues, SMS and MMS are all listed. But recording is $4.95 per user a month, enhanced queues $14.95 and E911 $1.80, so the basics come with a meter. | BCloud PBX, numbers in 110+ countries, apps and a webphone, a built-in CRM, AI agent and speech analytics, and an API. Nothing in the listing is missing from a small team's phone job. |
| Ease of use | CNo store rating on record. It needs phones or apps set up, auto attendants and rules built, and each feature switched on and priced. | CNo store rating on record. Numbers, extensions and call routing all need setting up. |
| Platforms and integrations | ASoftphone apps for Mac, Windows, Linux, iOS and Android, a browser app and any SIP device, plus HubSpot, Zendesk and Odoo and an open API. | AWeb, Mac, Windows, iOS, Android and a browser extension, with 6 integrations and an API. No Linux app listed. |
| Best for | small offices that want phones in a per-user price | a small team wanting a free cloud phone system |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: OnSIP and Zadarma. How we grade
Price against what you get
OnSIP starts at $18.95 a month for each person and scores 2.7 out of 4 on features, ease of use and platforms. Zadarma starts at $39 a month and scores 3.0.
Zadarma scores higher, and starts $20.05 a month higher: the question is whether the extra is worth that to you. Of the other business phone systems on the chart, 4 score higher than OnSIP for less, and 6 score higher than Zadarma for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Zadarma also covers transcription, AI support agent and call tracking.
At a glance
| OnSIP | Zadarma | |
|---|---|---|
| Pricing | Paid | Free plan |
| Starts at | $18.95 per user / month (5-user minimum) | $39 per month for up to 10 users, billed annually ($44 monthly) |
| Free plan | None | Standard plan: $0 a month for up to 5 PBX users, with calls, numbers and extra PBX features paid for separately as used. |
| Free trial | None listed | None listed |
| Web | ||
| macOS | ||
| Windows | ||
| Linux | ||
| iOS | ||
| Android | ||
| Browser extension | ||
| Made by | Junction Networks | Zadarma |
| Price read from | onsip.com | zadarma.com |
| Checked | Nov 12, 2026 | Nov 12, 2026 |
Worth knowing
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.
Zadarma
- Prices depend on the region selector; the figures here are the page's default World region.
- The Standard plan includes no minutes or numbers, so calls and numbers are charged separately.
- Annual prices apply to yearly payment; the monthly figures are higher, and plans cap users at 5, 10 or 20.
- Linux apps are not listed on the calling-apps page.
Key features
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.
Zadarma
- Free cloud PBX
- Voice menus, call routing, call recording, working-hours rules and extensions for up to 5 users at no monthly charge on the Standard plan.
- Numbers in 110+ countries
- Landline, mobile, national and toll-free virtual numbers can be added, and existing numbers can be ported in.
- Calling apps and webphone
- Apps for Windows, macOS, Android and iOS, a browser webphone using WebRTC, a Chrome plugin and support for SIP phones.
- Teamsale CRM
- A free built-in CRM stores customers and makes or receives calls in the browser, with an auto dialler and bulk email.
- AI agent and speech analytics
- An AI voice agent answers and places calls from a knowledge base, and speech recognition transcribes recorded calls.
- Integrations and API
- The page cites over 20 integrations, including HubSpot, and an API for custom connections.
Plans
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.
Zadarma
Standard$0
per month for up to 5 users
Free cloud PBX with 4 voice menus, 200 MB of recording storage and 5 concurrent outgoing calls; no included minutes or numbers.
Office$39
per month for up to 10 users, billed annually ($44 billed monthly)
2,500 free outgoing minutes, 1 virtual number, 400 speech recognition minutes, 100 AI agent minutes and 6 voice menus.
Corporation$79
per month for up to 20 users, billed annually ($88 billed monthly)
5,000 free outgoing minutes, 2 virtual numbers, 1,000 speech recognition minutes, 200 AI agent minutes and 12 voice menus.
Ways to pay less
OnSIP
No public discounts listed.
Zadarma
- Annual discount
Annual payment lowers plan prices
The pricing page toggle shows Office at $39 and Corporation at $79 a month with annual payment, against $44 and $88 paid monthly.
Common questions
Which is cheaper, OnSIP or Zadarma?
As of Nov 12, 2026, OnSIP starts at $18.95 per user / month (5-user minimum), and Zadarma starts at $39 per month for up to 10 users, billed annually ($44 monthly). One is priced for each person and the other is not, so which costs less depends on how many of you use it.
Which has a free plan, OnSIP or Zadarma?
As of Nov 12, 2026, only Zadarma has a free plan. OnSIP does not.
Which platforms do OnSIP and Zadarma run on?
As of Nov 12, 2026, only OnSIP lists a Linux app and only Zadarma lists a browser extension. Both list a web app and macOS, Windows, iOS and Android apps. A platform missing from a listing is one its maker's pages did not mention.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.