What is the best VoIP phone system for a startup in 2026?
For a startup, the right phone system is not the one with the longest feature list. It is the one that grows from 2 to 15 people without billing you for empty seats.
Startups rarely stay the same size for a full quarter. You hire your first reps, open a second market, swap CRMs, and sometimes shrink again. Your phone system has to keep up without a contract that traps you, a license nobody uses, or a lost number your customers already saved.
Our short answer: Allo for founders and reps who live on their phones, KrispCall for the lowest bill while you are five people or fewer, CloudTalk to start on a single seat with local numbers in 160+ countries, Aircall if you qualify for its startup program, and CallHippo to start free for six months. Selling mainly in the US? Read the Quo note in our method section first.
Every price on this page is worked out at 2, 5 and 15 seats, minimums included. Already past twenty people in an office? Our ranking of VoIP systems for growing teams is the better fit.
The ranking is editorial: a sponsored placement is always labeled on its card, and no affiliate link changes a score.
The right phone system for where you are
Business at $32 per seat, billed yearly
Cheapest up to five peopleStarter at $12, minutes billed on top
One seat, many countriesStarter at €25, no seat minimum
Funded, under 25 employees84% off in year one
Start without payingBasic free for the first 6 months
US and Canada callingUnlimited US and Canada calls and texts
Five VoIP systems priced at 2, 5 and 15 seats
The price column shows the monthly bill on annual billing, on the plan we would pick for a startup. Seat minimums are counted: at Aircall, two founders pay for three licenses. Rank follows the score from our full reviews.
| Best for | Why startups pick it | Free plan | Team size | Visit | ||||
|---|---|---|---|---|---|---|---|---|
| 1 | Allo | Best for mobile teams | Business number in a phone app, free number porting | 3.8/5 | Business: $64 for 2, $160 for 5, $480 for 15 | — | 2 to 30 people | Visit → |
| 2 | KrispCall | Best on a tight budget | Lowest subscription in this ranking | 3.8/5 | Starter: $24 for 2, $60 for 5; Advance: $480 for 15, plus usage | — | 1 to 5 people | Visit → |
| 3 | CloudTalk | Best single-seat start | No minimum, local numbers in 160+ countries | 3.3/5 | Starter: €50 for 2, €125 for 5, €375 for 15 | — | 1 to 30 people | Visit → |
| 4 | Aircall | Best startup program | Aircall for Startups, deep CRM integrations | 3.2/5 | Essentials: $90 for 2 (3 seats), $150 for 5, $450 for 15 | — | 3 to 30 people | Visit → |
| 5 | CallHippo | Best free start | Basic free for 6 months, no-card trial | 3.1/5 | Starter after 6 months: $36 for 2, $90 for 5, $270 for 15 | ✓ | 1 to 15 people | Visit → |
Monthly cost on annual billing, before tax. CloudTalk lists its prices in euros. KrispCall Starter stops at 5 users, so the 15-seat figure uses Advance.
Is your tool missing from this page? Email us: hello@hackceleration.com
How we compared these systems for startups
Most lists on this question name seven to ten providers and a "from" price. None of them tells you what two founders pay when a vendor requires three licenses, or what happens when your headcount triples mid-contract. That is exactly where a startup overpays.
We compared official pricing pages, startup program terms and seat minimums, then read hundreds of user reviews, looking first for contract complaints: auto-renewals charged without warning, seats you cannot remove, usage fees nobody explained. Scores come from our full reviews of Allo, KrispCall, CloudTalk, Aircall and CallHippo, so each tool carries the same score across the site.
Four tools sit outside the ranking. Quo (formerly OpenPhone) is the natural pick for a US-only team: Starter at $15 per user billed yearly ($19 monthly), unlimited calls and texts to the US and Canada under fair use, its Sona AI agent included, and a 7-day trial; international calls run on credits and US texting needs carrier registration. Dialpad starts at $15 with a 14-day free trial. RingCentral and Zoom Phone make sense when the company already pays for their video suite. 3CX SMB Free is free up to 10 users, as long as you bring a SIP trunk.
- Value for moneyCost at 2, 5 and 15 seats, minimums, usage and add-ons.30%
- Features and depthMobile app, international numbers, AI, IVR.25%
- IntegrationsHubSpot, Pipedrive, Attio, Salesforce, Zapier.20%
- Ease of useSelf-serve setup, adding a seat in minutes.15%
- Customer supportResponsiveness, contract flexibility, exit and porting.10%
The ranking is editorial: a sponsored placement is always labeled on its card, and no affiliate link changes a score.
Allo
Allo puts your business number inside a phone app. No desk phone, no second SIM: the founder taking a demo call from an airport answers the same number as the rest of the team. Allo pitches Business at teams of 2 to 250, and two seats is where it starts paying off.
Plan on $32 per seat per month billed yearly, or $45 month to month. Two founders pay $64 a month, a team of five $160, fifteen people $480. The cheaper Solo plan is shown but not open yet. Porting your existing numbers is free, and numbers are available in more than 80 countries, which helps when your second market is abroad.
On the Business plan, Allo connects natively to HubSpot, Pipedrive, Attio and Salesforce, the four CRMs you see most in early-stage sales teams. The AI is the other draw, and it is billed separately: the AI receptionist that picks up when nobody can is another $32 per agent, and the power dialer is a paid team add-on.
The weak spot is support, the lowest sub-score in our review (2.6 out of 5). Public reviews are also polarized, with plenty of five-star and one-star ratings and few in between.
- Business number in a mobile app
- Free number porting
- Native HubSpot, Pipedrive and Attio
- ✓Monthly billing available
- ✓Numbers in 80+ countries
- ✓Ease of use scored 4.2 out of 5
- ✗Support scored 2.6 out of 5
- ✗AI receptionist is a paid add-on
- ✗Solo plan not available yet
The default pick for a startup that sells by phone on the go. Pay monthly while you hire, then switch to annual once the seat count holds steady.
KrispCall
KrispCall has the lowest subscription in this ranking: $12 per user per month billed yearly on Starter, $15 monthly. Two founders pay $24, a team of five $60. It is a sensible first phone bill for a startup without a full-time salesperson yet.
Two lines on its pricing page change the math. Starter is capped at 5 users: at the sixth hire everyone moves to Advance at $32, and fifteen people then cost $480 a month, more than CloudTalk or Aircall. On top of that, minutes and texts are billed on usage. User reviews keep coming back to this: call quality is stable, but invoices are hard to read and per-minute costs catch people off guard.
If you text US customers, add 10DLC registration, which US carriers require for business texting: $4.50 for the brand and $15 for the campaign, once, then a monthly fee. Its strongest sub-score is integrations (4.3 out of 5), with HubSpot, Pipedrive and Zapier ready to connect.
- Lowest entry price
- Integrations scored 4.3 out of 5
- Numbers in many countries
- ✓$24 a month for two founders
- ✓Month-to-month available
- ✓Ease of use scored 4.2 out of 5
- ✗Starter capped at 5 users
- ✗Minutes and texts billed on usage
- ✗10DLC fees for US texting
Hard to beat up to five people. Past that, rerun the numbers on Advance with your real call minutes.
CloudTalk
CloudTalk has no seat minimum on Starter and Essential, so a solo founder pays for one seat. Few tools at this price allow that. Starter is €25 per user per month billed yearly: €50 for two, €125 for five, €375 for fifteen. It includes 500 outbound minutes per user per month to the EU, the UK, Iceland and Norway. Essential, at €29, adds unlimited national calls in the EU and UK.
Local numbers cover more than 160 countries, handy when you scout a European market before hiring there. Conversation intelligence costs €9 more per user, the Power Dialer €15 (included on Expert). Watch out: Expert requires three licenses, like Aircall.
There is no official startup program. The closest thing is a referral offer of 50% off your first month with the code REFER50. Weak spots: value for money and support score 2.7 and 2.6 out of 5 in our review, and some customers report being billed for calls their plan advertised as included.
- No minimum on Starter and Essential
- Local numbers in 160+ countries
- 14-day trial without a card
- ✓500 European minutes on Starter
- ✓REFER50: 50% off the first month
- ✓Features scored 3.9 out of 5
- ✗Expert needs 3 licenses
- ✗Support scored 2.6 out of 5
- ✗AI and dialer are add-ons
The most flexible start for a solo founder calling Europe. Check exactly which calls your plan counts as included before you scale up.
Aircall
Aircall is the only vendor in this ranking with a published startup program. Aircall for Startups gives 84% off the Professional plan in year one, with three licenses and 500 AI voice agent minutes a month included. In year two the discount drops to 50%, AI voice agent minutes included; in year three you pay list price. To qualify you need fewer than 25 employees, backing from a VC fund or accelerator, less than $10M raised, and no existing Aircall account. You apply through a form and Aircall says it answers within two business days.
Outside the program the math is less friendly. Aircall requires 3 licenses minimum at $30 on Essentials, so two founders pay $90 a month for an empty seat. Five people cost $150, fifteen $450. One number is included, extra numbers cost more, and AI add-ons stack on top.
What you pay for is the CRM link (4.1 out of 5 in our review): the contact record opens when a customer calls and the call logs itself in HubSpot or Salesforce. The catch is the contract. Public reviews mostly mention annual renewals charged without proration and seats that are hard to drop mid-year, and support is the lowest sub-score in this ranking (2.1 out of 5).
- Aircall for Startups: 84% off year one
- Contact record on every call
- Widest integration catalog
- ✓3 licenses included in the program
- ✓500 AI agent minutes a month in year one
- ✓Integrations scored 4.1 out of 5
- ✗3-license minimum outside the program
- ✗List price from year three
- ✗Support scored 2.1 out of 5
Worth it if you tick all four program boxes: year one becomes very cheap. Put the year-three renewal date in your calendar the day you sign.
CallHippo
CallHippo is the only tool here with a $0 plan, and it does not last forever. Its pricing page states that Basic is free for the first six months after signup, after which you must move to Starter. Budget for that from day one.
Starter costs $18 per user per month: $36 for two, $90 for five, $270 for fifteen. Professional is $30 and Ultimate $42, and annual billing gives three months free, i.e. 25% off. The AI Copilot add-on is paid extra; check the pricing page when you sign up. The 10-day trial needs no card, so you can run it the same week as CloudTalk or KrispCall.
Weak spots: value for money (2.4) and support (2.5) are among the lowest in our reviews, and customers complain about a strict no-refund policy. Enterprise requires 50 users, so it is not a startup option.
- Basic at $0 for 6 months
- 10-day trial, no card
- Starter at $18 afterwards
- ✓Zero cost to start
- ✓Simple pricing page
- ✓Integrations scored 3.8 out of 5
- ✗Free plan ends after 6 months
- ✗Value scored 2.4 out of 5
- ✗Hard to get refunds
Good for validating a market without spending. Around month five, compare it with Allo or CloudTalk before the move to Starter happens on its own.
What costs a growing team more than the sticker price
The per-seat price matters less than the rules around it. Four clauses catch startups out.
The empty seat
Aircall requires three licenses, and so does CloudTalk Expert. With two founders, you pay 50% more than you use. Allo, KrispCall and CloudTalk Starter or Essential start at one seat.
Annual billing while headcount moves
Annual billing saves real money: 25% at Aircall, 25% at CallHippo (three months free). But annual seats are rarely removable mid-term, and renewal complaints are common. Our rule: monthly while your team changes every quarter, annual once a seat count has held for six months.
Free plans with an end date
CallHippo Basic ends after six months, Allo Solo is not open yet. Put the date in your calendar. Usage billing at KrispCall and international credits at Quo also turn a fixed bill into a moving one.
AI sold separately
Call summaries, receptionists and dialers are nearly always add-ons: $32 per agent at Allo, €9 at CloudTalk; CallHippo also sells AI Copilot as an add-on. Early on, one AI agent on your main line is often enough.
- Count the seats you will need in six months, not today.
- Ask for the seat minimum and what happens when you drop one.
- Get the renewal date and terms in writing.
- Check whether you qualify for a program (Aircall for Startups, HubSpot for Startups).
- List the countries you will call this year.
- Keep your current line active until the port completes.
Set up your startup's phones without losing your number
This takes an afternoon. It avoids the two mistakes we read most often on forums: a lost number and choppy audio.
Start the port before you cancel anything
NumberTo keep your number, your new provider files the port request with your current carrier. Do not cancel the old line yourself first: a cancelled number can be released and lost. Have your account number and PIN from the old carrier ready, and wait for the port to complete before closing the old account.
Pick numbers by use, not by person
StructureA startup rarely needs a number per employee. One main sales line, one support line and one local number per market you are entering is usually enough. Quo includes one number per user and charges $5 for each extra; Aircall includes one and charges for more. Add seats to an existing number rather than numbers to seats.
Register for US business texting early
USTexting US customers from a local business number requires 10DLC registration with the carriers. Fees are small but approval takes time, and unregistered messages can be blocked. KrispCall lists $4.50 for the brand and $15 for the campaign; Quo lists a $19.50 one-off fee plus $1.50 to $3 a month.
Check your connection before the first customer call
NetworkA standard-quality call (G.711 codec) uses about 87 kbps each way. Ten simultaneous calls need under 0.9 Mbps upstream, which any fiber line handles. The real risk in a shared office or accelerator space is Wi-Fi crowded by video calls. Wire the desks that call the most.
- One G.711 call
- ≈ 87 kbps each way
Connect the CRM on day one
SalesA call that leaves no trace in the CRM is lost for follow-up. Allo connects to HubSpot, Pipedrive, Attio and Salesforce on Business; Aircall and KrispCall cover HubSpot and Pipedrive too. HubSpot runs its own startup program, so check whether you qualify before paying full price for a CRM.
Run a real two-person trial
ChoiceTrials run from 3 days (Allo) to 7 (Quo), 10 (CallHippo) and 14 (CloudTalk, Dialpad). Install the app on a founder's and a rep's real phones, make real customer calls, and check that notifications arrive when the phone is locked. Mobile app complaints are the most common across every vendor.
Other pages for your situation
Each page answers a different question.
Cost at 5 and 20 users.
You need an IVR and call queuesVirtual phone systemsReception and queues.
You are torn between Aircall and CloudTalkAircall vs CloudTalkHead to head.
You are weighing Aircall and KrispCallAircall vs KrispCallPrice and minutes.
You do not qualify for Aircall's programAircall alternativesOptions without minimums.
You are leaving a 3CX setupSwitch from 3CXMigrate without downtime.
VoIP for startups · FAQ
What is the cheapest VoIP phone system for a startup?
KrispCall Starter at $12 per user per month billed yearly is the lowest subscription we compared, but minutes are extra and it stops at 5 users. CallHippo is free for six months, then $18. For US-only calling, Quo Starter at $15 includes unlimited US and Canada calls.Should a startup use VoIP or personal cell phones?
VoIP. A business number in an app keeps personal numbers private, stays with the company when someone leaves, and logs calls in your CRM. Founders' cell numbers end up on business cards and are impossible to hand over later.Is there a free VoIP phone system for startups?
Not for long. CallHippo Basic is free for the first six months only. 3CX SMB Free stays free up to 10 users, but you pay a SIP trunk provider and need someone to configure it.Do I have to sign an annual contract?
Not at first. Annual billing is about 25% cheaper at Aircall and CallHippo, but annual seats are hard to drop mid-term. Pay monthly while headcount moves every quarter, then go annual on the seats that stay put.Who qualifies for Aircall for Startups?
Startups with fewer than 25 employees, backed by a VC fund or accelerator, with less than $10M raised and no existing Aircall account. They get 84% off Professional in year one with three licenses included. List price returns in year three.Can I keep my existing number?
Yes, through number porting. Your new provider files the request; keep the old line active until the port completes. Allo ports numbers free of charge.Which VoIP system works best with HubSpot?
Aircall and Allo log the call, recording and notes on the contact record automatically. KrispCall connects too, at a much lower entry price. During the trial, check that the activity appears without any manual step.How much does VoIP cost for a 5-person startup?
Between $60 and $160 a month on annual billing, depending on the tool. KrispCall Starter is $60 plus usage, CloudTalk Starter €125, Aircall Essentials $150, Allo Business $160. Add extra numbers and any AI add-ons.