KeepCalling vs Rebtel
Two established prepaid calling services with very similar propositions. The comparison comes down to two lines in the terms that neither advertises.
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Both dial real phone numbers, neither charges a connection fee, and both sell prepaid credit with optional monthly plans. Both bill per minute.
Two published differences are worth the reading. KeepCalling states explicitly that its billing uses minute rounding — a call is charged to the next whole minute — and that its credit does not expire, with a $2 minimum order. Rebtel markets one-minute billing and no hidden fees, but publishes no clear answer on whether unused credit expires. If you make short calls, rounding is the cost that matters; if you top up in large amounts, expiry is.
Side by side
Pick what you care about and the differences reorder.
3 of 8 fields differ; 4 are the same.
How to read this comparison
Work down in this order and most comparisons resolve in under a minute. First, can it reach the number you actually need — a service that only calls its own users is not a cheaper version of one that dials a landline, it is a different thing. Second, what are the billing terms: the unit a call is measured in, and whether a fixed fee is added to each one. Third, what happens to money you do not spend.
The per-minute rate is deliberately not the first question here, and it is the only question most comparisons ask. At the same advertised rate, a service that rounds every call up to a whole minute and adds a per-call fee can cost close to double another on the short calls that make up most people's actual usage. The rate is the number that gets compared because it is the number that gets published.
Where they actually differ
Billing unit
KeepCalling bills rounded up; Rebtel bills per minute. At an identical per-minute rate those produce different bills, and the gap is widest exactly where most people call. Rounding a 35-second call up to a whole minute is a surcharge of roughly seventy per cent on that call, and it appears in no rate comparison anywhere, because the rate has not changed.
Credit expiry
KeepCalling: Never. Rebtel: Not published. Expiring credit is a cost that appears in no rate table, and it matters in proportion to how much you top up at once and how irregularly you call. A balance bought for emergencies and left unused is precisely the balance an inactivity rule takes.
Platforms
KeepCalling runs on iOS, Android, Web. Rebtel runs on iOS, Android. This decides more comparisons than it ought to: a service that is excellent and unavailable on the device in your hand is not a candidate at all, and a desktop client matters more than it sounds when the alternative is holding a phone against your ear for an hour.
Where they are the same
- Calls a phone number: both dials real phone numbers.
- Connection fee: both none.
- Subscription: both offers a subscription.
- Account required: both account required.
What each one is
KeepCalling
KeepCalling is an international calling and top‑up service that sells prepaid voice credit and monthly calling plans for calls to landlines and mobiles in over 200 destinations, accessible via access numbers and mobile apps.
Rebtel
Rebtel is a mobile app and service that provides low‑cost international calls and mobile top‑ups, using local access numbers or data to connect calls to landlines and mobiles in over 190 countries.
How each one bills you
As published by KeepCalling
- per minute, with minute rounding.
- none (marketing emphasises no hidden or extra fees; rounding is per minute).
- App store descriptions state that voice credit balance 'never expires'; only minute rounding is applied during calls.
- $2 (minimum order noted for voice credit).
As published by Rebtel
- per minute (Rebtel markets one‑minute billing).
- none (Rebtel markets 'no hidden fees' and does not list a separate connection fee).
- Marketing emphasizes no contracts and no hidden fees; public pages do not prominently document a fixed expiry period for purchased calling credit.
- Voice credit/top‑up minimum not clearly stated; some plans sold in fixed price bundles such as unlimited and minute packages.
What each one asks of you
As published by KeepCalling
Users create an account on KeepCalling.com, purchase voice credit or a plan, and can then call via access numbers or smartphone apps.
As published by Rebtel
Users install the app on iOS or Android, create a Rebtel account, and verify with their phone number to start calling or sending top‑ups.
Plans, where each one sells them
As published by KeepCalling
Offers minutes‑based calling plans from $4.99/month, unlimited country‑specific plans from $2.99/month, and a World Unlimited plan from $10/month, plus separate prepaid Voice Credit with a minimum order of $5 according to the calling‑plan page.
As published by Rebtel
Offers Unlimited Country plans (e.g. India Unlimited), Global Unlimited, and minutes‑based plans, alongside pay‑per‑minute credit.
Published rates
The corridor prices each provider published at the time of the research. An empty list means the provider does not publish its rates outside its own app, which is itself worth knowing before you top up.
KeepCalling
- United States, landline: Low per‑minute rates such as around 0.9¢/min to Brazil are given as examples; the full table includes US as a destination but specific US row is not visible in snippet.
Source, as recorded: KeepCalling country‑specific rate tables and calling‑plan overview; detailed US/UK/India/Nigeria/Philippines rows are accessible via the 'Rates' tab.
Rebtel
- India, mobile: From about $0.0278/min pay‑as‑you‑go or included in unlimited India subscriptions; exact current per‑minute USD rate varies by plan.
Source, as recorded: Rebtel official rates and India calling explainer pages; detailed per‑country tables are in the in‑app rate lookup and web 'rates' tool.
What each one does
KeepCalling
- Sells prepaid Voice Credit for calls to over 200 destinations.
- Offers monthly calling plans with fixed minutes or unlimited calling to specific countries and a World Unlimited plan.
- Provides local access numbers and smartphone apps for placing calls.
- Supports international SMS at separate per‑message rates.
- App descriptions emphasise no hidden or extra fees and minute rounding.
- Balance is advertised as never expiring, provided the account remains active.
- Mobile apps available for iPhone and Android devices.
- 24/7 customer service is promoted through app‑store descriptions.
Rebtel
- Places international calls to landlines and mobiles in more than 190 countries.
- Uses local access numbers when available so calls can work without an active data connection.
- Offers unlimited calling subscriptions and destination‑specific minute bundles as well as pay‑as‑you‑go credit.
- Supports mobile top‑ups to international numbers from within the app.
- Markets 'no contracts or hidden fees' and transparent per‑minute pricing.
- Provides apps for iOS and Android; no separate desktop app is promoted.
- Targets migrants and international nomads as primary user segments.
- Calls can be routed over 3G/4G, Wi‑Fi, or local phone lines depending on configuration.
What users complain about
KeepCalling
- Some user reviews report occasional call quality issues to certain destinations.
- There are complaints about the auto‑renewal of calling plans and difficulties cancelling before renewal dates.
- A small number of users mention confusion about minute rounding and how many minutes remain for a given balance.
Rebtel
- Some app‑store reviews report occasional call drops and variable call quality, especially on weaker mobile data connections.
- Users have complained about promotional offers or 'unlimited' plans having fair‑usage conditions they found unclear.
- Several reviews mention issues with billing or being charged unexpectedly when local access numbers are treated as chargeable calls by mobile carriers.
About each company
| Founded | — | 2006 (described as a Swedish technology company founded in 2006). |
|---|---|---|
| Headquarters | — | Stockholm, Sweden (company described as Swedish with international operations). |
| Users | — | Rebtel cites 'more than 2 million users' on its App Store description. |
| Store rating | — | Approximately 4.2–4.6 out of 5 with several hundred thousand reviews, according to Google Play and APK aggregators. |
| Minimum purchase | $2 (minimum order noted for voice credit). | Voice credit/top‑up minimum not clearly stated; some plans sold in fixed price bundles such as unlimited and minute packages. |
Website: KeepCalling Rebtel
If neither of them fits
Both of the services above bill per minute or cannot dial a phone at all. If what you need is to call an ordinary number and pay only for the seconds you talk, that is what we publish — and the same nine fields are in the table above, in the first row, marked as ours.
Rates from $0.03 a minute across 41 destinations, billed per second with no connection fee and credit that does not expire.
What Telvio does and does not doSources and dates
Every value on this page is quoted from the provider's own published material, gathered in a structured research pass on 2026-03-18. Where a provider published no answer, the page says so rather than estimating. Nothing here is a review: call quality, reliability and support are not assessed, because they cannot be established from published material.
Bottom line
Both are per-minute prepaid international calling services that dial real numbers and charge no connection fee.
KeepCalling publishes both the awkward details: minute rounding, and credit that does not expire, with a $2 minimum order. Rebtel publishes no clear answer on credit expiry.
Rounding costs most on short calls; expiry costs most on large balances. Which one matters depends entirely on how you call.
Frequently asked questions
Can KeepCalling call a landline or mobile number?
Yes. KeepCalling dials ordinary landline and mobile numbers, so the person you are calling does not need to install anything.
Can Rebtel call a landline or mobile number?
Yes. Rebtel dials ordinary landline and mobile numbers, so the person you are calling does not need to install anything.
Does KeepCalling charge a connection fee?
No separate connection fee is published for KeepCalling, so the cost of a call is the per-minute rate applied to the billed time.
Does Rebtel charge a connection fee?
No separate connection fee is published for Rebtel, so the cost of a call is the per-minute rate applied to the billed time.
Does unused credit expire on KeepCalling or Rebtel?
Credit on KeepCalling does not expire according to its published terms. Credit on Rebtel has no published expiry policy, so it could not be confirmed. Expiry costs most when you top up in large amounts and call infrequently.
Which is cheaper for short calls, KeepCalling or Rebtel?
Neither publishes per-country rates in a form that allows a like-for-like table, so the comparison rests on billing terms. KeepCalling bills rounded up, Rebtel bills per minute. On calls of under a minute the billing unit and any per-call fee change the total more than the headline rate does.
Do KeepCalling and Rebtel require an account?
KeepCalling: Account required. Rebtel: Account required. Every service in this comparison set except one requires you to identify yourself before you can call.
Which devices do KeepCalling and Rebtel run on?
KeepCalling runs on iOS, Android, Web. Rebtel runs on iOS, Android. These are the platforms each provider publishes.
