WhatsApp shared inbox pricing: per seat, per conversation, or per connection?

Most tools show their cheapest tier in the headline, which typically covers one or two people, not a real team. By the time you add the full headcount, a second number, and any campaign volume, the actual monthly cost is often two to three times that number. The model below each headline is why.

Every WhatsApp shared inbox tool uses one of three billing units, or a hybrid of two.

**Per seat** charges for every active agent account. The bill is tied directly to headcount. Hire a sixth rep and the bill goes up immediately. The vendor does not care how busy the team is, how many numbers you run, or how many messages you send. The unit is a person.

**Per conversation** charges for each 24-hour customer service window. A window opens every time a customer sends a message, and the tool bills per window. Volume is the billing driver. A quiet month is cheap. A product launch or seasonal spike can produce a bill the team did not plan for.

**Per connection** charges for each WhatsApp number connected to the workspace. Team members are bundled in up to a limit, so the bill grows when you add a new number, not when you add a new person. The unit is the phone number.

Some tools combine two of these: a base seat fee plus per-message campaign charges, or a per-seat fee with a conversation cap. Those hybrids are harder to estimate, and the math below flags them where relevant.

Per-seat pricing is straightforward to understand and expensive to grow. Every person who needs access to the inbox has a line on the invoice.

Periskope charges approximately $20 per user per month on its Starter tier and $30 per user per month on Pro, as of mid-2026. A 10-person team on Starter runs $200 a month. At 15 people, $300. If you run multiple WhatsApp numbers, Periskope adds separate phone licensing fees after the first number. The Periskope alternatives guide covers this in more detail.

Wassenger's Professional plan is €39.90 per month and includes 3 agents. Its Business plan is €69.90 per month and includes 5 agents, with extra agents at €14 per month each, as of mid-2026. A 10-person team on Business would need 5 extra agents at €14 each, putting the total at roughly €140 per month.

Respond.io is $79 per month on Starter for 5 users and $159 on Growth, with additional users added on top and a monthly active contact metering layer, as of mid-2026.

Per-seat pricing makes sense when headcount is stable and the tool's feature set genuinely justifies the cost per person. It is the most predictable model when growth is slow. Where it hurts is a team that is actively hiring. Each new person immediately adds to the SaaS bill regardless of whether that hire increases revenue. A seasonal business adding 10 agents for Q4 pays full seat fees for the whole quarter even after they leave.

Per-conversation pricing ties the bill to volume rather than headcount. It looks affordable at low message counts, and it can surprise you during busy periods.

Meta's WhatsApp Business Platform charges its own conversation fees at the platform layer, separate from any tool cost. WATI builds its pricing on top of a base plan with included users and then layers per-message campaign fees on campaigns sent outside the standard inbox window. That hybrid means a team pays a flat plan fee plus a usage fee that varies with volume.

AiSensy offers a free base plan and charges per marketing message sent as a broadcast. For teams primarily using one-to-one inbox conversations, the model is low-cost when volume is low. For teams running regular campaigns, the per-message charges accumulate. The WATI alternatives guide walks through what the hybrid model looks like in practice.

Per-conversation pricing suits teams whose inbound load is steady and predictable, like support teams that mostly answer customer-started chats. It works poorly for outbound-heavy teams, because proactive campaigns open many windows simultaneously and the bill spikes with the activity.

Per-connection pricing ties the bill to the WhatsApp number rather than to the team members accessing it. Members are included up to a limit, and the cost only grows when you add a new number.

Among WhatsApp shared inbox tools aimed at small and mid-sized teams, this model is less common than per-seat. Clapvo is the clearest example of it in this space. The logic is that the WhatsApp number is the business asset. Whether 3 people or 8 people answer it, the number is the same, so it makes more sense to price the asset than the headcount.

Clapvo's Gold plan is $15 per month per connection (R$89 in Brazil), and that includes 1 WhatsApp connection and 5 team members. Adding a second WhatsApp number is another $15 per month. Adding an extra team member beyond the 5 included is $15 per month per person. Adding 10,000 extra campaign messages is $15 per month. Annual billing comes out to $149 per year per connection, a 17% saving. There is a 7-day free trial with no credit card required.

Per-connection pricing is not always cheaper. The scenario where it costs more is when numbers outnumber people. A business running five separate WhatsApp numbers with only 2 people on each would pay $75 per month in connection fees alone, before any user add-ons. A per-seat model covering that same small headcount might be lower. The model works best when team size grows faster than the number of WhatsApp connections. Our guide on managing multiple WhatsApp numbers covers how to think about that ratio.

Here is one worked scenario: a 10-person team running one WhatsApp number, mid-2026 pricing.

On Periskope Starter at $20 per seat: 10 people times $20 equals $200 per month.

On Wassenger Business at €69.90 for 5 agents, plus 5 extra at €14 each: €69.90 plus €70 equals roughly €140 per month.

On Respond.io Starter at $79 for 5 users, with additional users on top: at minimum $79 per month, likely $120 to $160 once the extra 5 users are added at the published add-on rate.

On Clapvo at $15 for the connection and 5 members included, plus $15 per month for each of the 5 extra users: $15 base plus $75 in user add-ons equals $90 per month.

Now scale to 15 people on the same one number.

Periskope Starter: 15 times $20 equals $300 per month.

Clapvo: $15 base plus $15 times 10 extra users equals $165 per month.

The gap widens with headcount because the per-seat bill grows linearly with people while the per-connection bill grows with a mix of numbers and people. The crossover happens when the per-connection add-on math catches up to the per-seat total, which depends on how many users sit above the 5 included.

These are illustrative numbers, not a billing calculator. The actual cost in your case depends on your specific team size and number count. Verify the current figures on the Clapvo pricing page and on each competitor's site before buying.

Headline price comparisons miss what is bundled versus what costs extra. A cheaper base plan that gates key features behind a higher tier can end up more expensive than a higher base that includes everything.

On Clapvo's $15 base plan, the core workspace includes: shared team inbox with chat assignment and private notes, kanban pipeline board with configurable columns, quick replies (shared and personal), templates (text, media, and document formats), contact management with bulk CSV import, role-based permissions with phone number masking per agent, the Android app, schedule messages, and edit sent messages.

The automation and developer layer is also included at the same base price, not locked behind a higher tier. That means sender rotation across multiple numbers to reduce rate-limiting risk on broadcasts, A/B message testing across campaign variants, message sequencing with configurable delays between sends, the Message Bot for keyword-triggered automated replies without an agent, and the full API for programmatic message sending and webhooks into your own systems. Live chat support is also included.

Most per-seat tools gate the automation layer (bots, sequencing, A/B testing) and the API behind a higher plan tier. If your team needs any of those features, add the cost of the tier that unlocks them, not just the seat cost, to your comparison.

What Clapvo does not have: an iOS app, Instagram or email inbox, and AI automation is listed as in progress in the product FAQ rather than fully live today. No model fits every team, and these are real limits worth knowing before you sign up.

The fastest way to cut through the options is a single ratio: count your people, count your numbers.

If people outnumber numbers, which is the common case for a support or sales team on one or two lines, per-connection pricing tends to work in your favour because the bill does not grow with every hire. If numbers outnumber people, as with an agency managing many client lines with a small team, per-connection fees stack up and a per-seat model may be cheaper.

Per-conversation pricing sits between the two: cheap at low predictable inbound volume, expensive the moment you run proactive campaigns or hit a seasonal spike.

If you want to understand the tools available at each price point before applying this ratio, the shared inbox tools comparison maps the main options. If you are still deciding whether a shared inbox is even the right fit over a CRM, the Do you need a WhatsApp CRM? guide resolves that first.

These five questions will surface the real monthly cost before you commit.

First, what is the billing unit: seat, conversation, or connection? What happens to the bill if team size doubles?

Second, does the tool include Meta's WhatsApp Business Platform message fees, or are those separate? If you are running on the Cloud API, those fees exist and can add materially to the bill during high-volume months.

Third, what is the cost of adding the sixth user? Some tools include a number of seats and then charge steeply per extra seat beyond that.

Fourth, what is the cost of adding a second WhatsApp number? For teams that want to separate a sales line from a support line, or run sender rotation across numbers to reduce ban risk, the second-number cost matters. The broadcast campaigns and sender rotation guide explains why multiple numbers are worth having for campaigns.

Fifth, is the free trial truly no-credit-card, and what does cancellation involve? A trial that auto-bills on day eight is a different kind of free trial.

Clapvo prices per WhatsApp connection at $15 per month on the Gold plan, with 5 team members included and a 7-day free trial with no credit card. The model works best for a growing team on one or two numbers, specifically a 10-to-15-person support or sales team where adding a hire should not automatically raise the software bill.

It does not always win. A business running many numbers with few people on each will find the connection fees add up faster than per-seat pricing on a small headcount. And Clapvo is WhatsApp-only with an Android app and no iOS app, so teams that need multiple channels or an iOS-first workflow should weigh that honestly.

The quickstart guide and users and roles docs show what the workspace looks like before you decide. If multiple agents sharing one number is the core problem, the team inbox guide is the right place to start. The WhatsApp Business app vs API comparison explains the connection method behind how Clapvo links a number. Current plan details are on the pricing page.