Short answer: Aircall is the seat-licensed cloud phone built for sales and support voice teams: a power dialer, deep CRM call logging, and an AI Assist layer on top of the per-user bill. OpenPhone is the per-line phone app: US and Canada numbers that behave like a mobile app, with a shared inbox for calls, texts, and voicemail, and its AI receptionist sold as an add-on. The two do not compete on one axis; they compete for the same SMB voice budget from different lanes. Neither ships WhatsApp or programmable messaging as a first-class channel, so a team whose footprint grows past voice and per-line SMS adds a second vendor on either. The by-team-size verdict sits in section 4; one clearly labeled section maps the same rows onto Devotel Orbit's shipped surfaces; the rest is a third-party-only comparison.
1. Where each sits
Aircall — the seat-licensed voice team phone. Each user takes a license, and the license buys a cloud dial pad pointed at sales and support workflows: outbound power dialing, live call monitoring and whisper, and native integrations that log a call against the Salesforce or HubSpot record the moment it ends. That model suits a team whose calls are pipeline and tickets, and whose admins want the call history written into the CRM without a human copying it. The contact-center layer, the AI Assist layer, and the SMS digit all price on top of the seat.
OpenPhone — the per-line phone app. Each purchased number behaves like an app on the team's phones: calls, texts, and voicemail in one conversation thread per contact, shared across the team. That model suits a desk-of-one to a desk-of-many whose calls are relationships, not pipeline: the clinic, the brokerage, the studio. Its AI receptionist (Sona) is a separate add-on, and the channel set starts and ends at US and Canada calling and texting.
The SMB buyer chooses between these by lane: a sales or support voice operation grades Aircall's dialer and CRM rows first; a relationship-driven small team grades OpenPhone's per-line app rows first. Cross-shopping them on price alone compares two different products.
2. Evaluation axes — what to score before pricing enters
Five dimensions separate these two lanes on the row level, and this head-to-head keeps each cell defensible: call handling, CRM and helpdesk integrations, WhatsApp and SMS support, number porting posture, and the pricing model each bill follows.
Call handling — IVR depth, power dialer, AI answering. Aircall's call handling is the deeper of the two for an outbound operation: power dialer, live monitoring, and an IVR that routes into queues for support teams. OpenPhone's IVR is a lighter phone-menu preset: a ring order, a list of specialists, an after-hours toggle. On AI answering both vendors sell an add-on rather than a platform layer: Aircall's AI Assist and OpenPhone's Sona each bill on top of the base plan, so the "AI answers our calls" row costs a second line item on either invoice.
CRM and helpdesk integrations. This is Aircall's home lane: native Salesforce, HubSpot, and Zendesk integrations that attach the call, the recording, and the note to the record. OpenPhone's integration set is thinner; a team that needs every call written into a CRM pipeline reads the row accordingly and plans on a middleware hop where Aircall ships native.
WhatsApp and SMS support — the recurring SMB constraint. Aircall sells an SMS digit and reaches WhatsApp through integrations layered onto the seat license; OpenPhone ships per-line business SMS on its US and Canada numbers and has no WhatsApp surface at all. A team that needs a WhatsApp line customers can actually message, or an inbox where the SMS thread and the WhatsApp thread sit beside the call, pays for a second vendor on either incumbent. Devotel Orbit's frame-in section below maps the same rows onto its shipped omnichannel inbox.
Number porting posture. Both port incumbent numbers in on a standard LOA flow, and both publish the port-in path a buyer checks before signing. The export side is where the two differ in friction: OpenPhone publishes a workspace export of contacts and history; Aircall's exit path leans on support-assisted exports for history. A buyer leaving either should read the export instructions before pricing, because an incumbent that exports poorly is an incumbent the buyer stays with involuntarily.
Pricing model. Described qualitatively, on purpose: Aircall bills per seat per month with plan tiers, and the contact-center layer, the AI add-ons, and the SMS digit price on top of the seat. OpenPhone bills per line per month with published tiers, and the AI receptionist prices on top of the line. Seat-license versus per-line is the structural difference: a team whose headcount and whose number count grow at different rates will feel the two models differently, and every vendor pricing page should be checked at decision time because tiers move.
3. The head-to-head matrix
The cells below conflate nothing: Yes/No on shipped capability, Partial where the vendor covers the row with caveats a buyer should hear. Devotel Orbit's column enters for the frame-in section below, clearly labeled, and grades shipped surfaces only.
| Row | Aircall | OpenPhone | Devotel Orbit (frame-in) |
|---|---|---|---|
| Power dialer and live call monitoring for outbound teams | Yes | No | No (outbound runs through the programmable voice API and AI agents, not a seat dialer) |
| IVR and menus routing callers to teams | Yes | Partial | Yes (visual IVR canvas) |
| AI answering on inbound calls | Partial (AI Assist add-on) | Partial (Sona add-on) | Yes (AI voice agents in the core platform) |
| Native CRM and helpdesk call logging | Yes | Partial | Partial (integration catalog, not per-seat native logging) |
| Per-line business SMS (US/Canada) | Partial (SMS digit add-on) | Yes | Yes |
| WhatsApp Business as a messageable channel | Partial (integration add-on) | No | Yes |
| One inbox across calls, SMS, WhatsApp, and email | No | Partial (calls, texts, voicemail) | Yes (shipped omnichannel inbox) |
| Standard LOA port-in on published process | Yes | Yes | Yes |
| Contacts and history export on exit | Partial | Yes | Yes (porting history carries) |
| Pricing model | Per-seat tiers; contact layer, AI, and SMS price on top | Per-line tiers; AI receptionist prices on top | Usage-based, one bill across channels |
Read the cells by shape, not by count. Aircall wins the sales-and-support voice rows: the power dialer, the native CRM logging, the queue-shaped IVR. OpenPhone wins the per-line app rows: per-line SMS that simply works and a clean export on exit. The rows that lean against both incumbents are the channel rows: WhatsApp, and an inbox that holds more than voice and per-line text; on those, neither is a tie, and both hand the buyer a second vendor.
4. When to pick which — by team size
1 to 10 people. OpenPhone, for most teams in this band. A desk-of-one to a desk-of-ten wants numbers that behave like phones, one shared inbox, and a bill that tracks numbers rather than seats; Aircall's dialer and CRM depth go unused at this size, and its per-seat add-on stack bills for capability the team never opens. The exception is the ten-person outbound shop from day one: if the first hire's job is dialing, Aircall's lane is the right lane even at this size.
10 to 50 people. Aircall, once calls become pipeline or tickets. This is the band where the native CRM logging and the power dialer start paying for the seat price, and where OpenPhone's lighter menu and thinner integration set turn into manual work: someone copying call notes, someone re-dialing lists by hand. OpenPhone remains the right pick in this band for the relationship-driven team: the practice, the property manager, the studio, where calls are conversations the team already has, and per-line simplicity beats switchboard depth.
50+ people. Neither, taken alone. At this size the footprint that hurts is the one both incumbents leave open: a WhatsApp line, campaign messaging, an always-on AI answering layer, and one inbox holding all of it beside the calls. A team at this size keeps whichever incumbent fits its lane and adds second vendors, or consolidates onto a platform whose channel set is the product; the frame-in section below maps that consolidation choice. A 50+-seat outbound operation also outgrows a dialer bolted onto a phone system before it outgrows the phone system itself.
A buyer whose footprint still ends at voice plus SMS on US and Canada numbers keeps the incumbent whose lane matches the team; this page is for the pair where that footprint is about to sprout a WhatsApp line, a campaign lane, or an always-on AI handoff.
5. Devotel Orbit frame-in — consolidation choice, clearly labeled
This section is the one Orbit-in-frame part of an otherwise third-party-only post, and it comes with a disclosure, not a neutrality claim. Devotel Orbit publishes head-to-head pages for the full comparison registry on /compare, including Orbit vs Aircall and Orbit vs OpenPhone, and those pages argue Orbit's position by design. What they answer is the consolidation question both SMB incumbents leave open: when the team's footprint grows past voice and per-line SMS, does the team keep its phone system and add second vendor logins for WhatsApp, campaign messaging, and the AI handoff, or consolidate onto one account?
An Orbit frame keeps the phone-system primitives both incumbents ship: local and toll-free numbers on the programmable voice surface, a visual IVR canvas that replaces both Aircall's queue menus and OpenPhone's phone-menu presets, and AI voice agents that answer inbound calls as a core-platform capability rather than a billed add-on. It adds what neither incumbent ships as a first-class channel: SMS, MMS, WhatsApp Business, and email landing in one shipped omnichannel inbox beside the calls, on one usage-based bill. A buyer electing consolidation out of OpenPhone reuses the published runbook: migrate from OpenPhone to Orbit, the worked example that ports the numbers first, rebuilds the phone-menu presets on the IVR canvas, and carries the contact list across. Orbit has not yet published an Aircall-specific runbook; the same ordered arc applies, with the CRM call-logging cutover as the extra step an Aircall exit adds. A buyer electing to keep the incumbent should still score the choice on the public cell rows above rather than on vendor-conversation claims.
6. Honest limits — how this page sources its cells
Every competitor cell grades a categorical question against the vendor's own public pages: product, documentation, and pricing surfaces, retrieved September 2026. Where a row would need a private number to grade, the row reads as a posture instead; no competitor price figure is asserted on this page, by design. Vendor add-ons that exist but bill on top grade Partial, not Yes, because an add-on is a caveat a buyer should hear. Where a cell is wrong, a published source settles it: point us to the public page and the cell re-grades; there is no appeals layer between a public source and a correction.
Frequently asked questions
Which is cheaper for a five-person team?
The honest answer is structural, not numeric, and this page does not assert competitor prices. OpenPhone's per-line model bills for the numbers the team owns; Aircall's per-seat model bills for the people who dial. A five-person team whose calls are relationships usually spends less on the per-line model; a five-person outbound team gets more paid-for capability from the seat. Check both pricing pages at decision time, because tiers move.
Can either handle WhatsApp for customer messaging?
Not as a first-class channel. Aircall reaches WhatsApp through integrations layered onto the seat license; OpenPhone has no WhatsApp surface at all. A team that needs a WhatsApp line customers can message, with the thread in the same inbox as the calls, adds a second vendor on either incumbent, or consolidates onto a platform that ships the channel; the frame-in section above maps that row.
Which suits an outbound sales team?
Aircall, in this pair. The power dialer, the live call monitoring, and the native CRM logging are exactly the rows an outbound team works every day, and OpenPhone does not compete on them. The caveat is the exit lane: outbound teams are also the teams that outgrow a dialer bolted onto a phone system first, so the programmable-voice question deserves a row in the same evaluation.
Published 27 October 2026.