# Best support desks for software companies (Plain, Intercom, Help Scout)

> Plain for software companies that run support in Slack and want their own product data in every thread. Intercom for chat-first teams that want AI resolving a large share of conversations. Help Scout for small teams that want email-style support and nothing to learn.

Human page: https://testedactually.com/b2b-support-desks/
Mirror: https://testedactually.com/b2b-support-desks.md
Updated: 2026-10-09

## Picks

- **Plain** — best for software companies that live in Slack and want customer context from their own API rendered into every thread. Don't use it if you want chat widgets and AI out of the box at low cost, Plain is API-first B2B tooling and seats plus credits price accordingly
- **Intercom** — best for chat-first support where an AI agent resolves a large share of conversations. Don't use it if budget forecasting, Fin bills per resolution on top of per-seat prices that reach $132 a month
- **Help Scout** — best for small teams that want email-style support with the gentlest learning curve and a free plan. Don't use it if you will outgrow it, the API is not the architecture and Slack depth is integration-grade

**B2B support desks — compared**

| Tool | Free tier | Paid from | Channels | Slack-native | API-first | AI crawlers |
| --- | --- | --- | --- | --- | --- | --- |
| [Plain](/b2b-support-desks/plain/) | 7-day free trial, no credit card required | $35/mo | Slack, email, in-app forms, live chat, Help Center; Teams and Discord on higher tiers | Yes, Slack is the primary surface with discussions, digests, and in-Slack actions | GraphQL API, webhooks, events; customer cards render your product data inline | unknown |
| [Intercom](/b2b-support-desks/intercom/) | Free trial; no permanent free plan | $29/mo | In-app messenger, live chat, email, Help Center, phone via Fin Voice (sales) | Integrations available, not a Slack-first surface | Mature API and app store, but the product surface is its own messenger inbox | unknown |
| [Help Scout](/b2b-support-desks/helpscout/) | Free plan available with user cap | $25/mo | Email (shared inbox), live chat, Help Center (Docs), with AI Answers at $0.75 per resolution | Integrations available, inbox-first rather than Slack-first | API available but not the architecture; third parties describe it as not API-first | unknown |

## Related comparisons

- [Notification infrastructure](https://testedactually.com/notification-infrastructure/) — Novu and Knock are the delivery engines support tools hand off to, and a Plain-vs-Intercom buyer evaluating API-first architecture meets both

## Don't use it if

- **Plain**: you want a paste-in chat widget with AI included cheap, Plain is API-first B2B tooling priced for software companies, not a $29 widget.
- **Intercom**: you need predictable monthly costs, Fin bills per resolution on top of seats, so a busy month is a bigger bill.
- **Help Scout**: you expect API-first architecture and deep Slack workflows, that is not its shape.

## The Slack-native challenger, the AI incumbent, and the inbox classic

Support desks for software companies are splitting into three shapes, and
the right pick depends on where your team already works.

Plain is the API-first shape: a GraphQL API, webhooks, and customer cards
that render your own product data, subscription state, and usage straight
into the support thread. Slack is the primary surface, not an
integration, with discussions, digests, and actions living where your
engineers already are. Its Ari agent and Sidekick assistant work off the
same credit pool. This is tooling built for companies whose customers are
developers, and the pricing says so.

Intercom is the AI-incumbent shape: a mature messenger, help center, and
Fin, an AI agent priced at $0.99 per resolution on every plan. The pitch
is arithmetic, if Fin closes most conversations, seats stay few. The risk
is the same arithmetic in reverse, a support surge becomes a per-
resolution bill, and seats still cost $29 to $132 a month underneath.

Help Scout is the inbox classic: a shared inbox that behaves like email,
a knowledge base, and the gentlest onboarding in the category. It is the
cheapest real entry (free plan, then $25 per user), and third parties
fairly describe its limits, no API-first architecture, integration-grade
Slack, simplicity as a ceiling.

**Disclosure** [1]: we run Plain in production on our own product and it
holds this primary pick on the same columns as the rest of the table, not
on that relationship. No vendor here paid or commissioned this page.

## FAQ

### What is the best support desk for a B2B SaaS company?

Plain if your team lives in Slack and wants customer context from your own API in every thread, Intercom if chat-first support with an AI agent resolving conversations is the goal, Help Scout if you want the simplest email-style shared inbox. All three price per seat, and only Intercom separates AI resolution out at $0.99 each.

### Plain vs Intercom, which is better for developer-heavy products?

Plain, and it is not close on architecture. Plain is GraphQL API-first with customer cards that render your own product data inline, and Slack is the primary surface. Intercom is the stronger choice when the buyer wants the AI agent (Fin) resolving a large share of volume and accepts per-resolution pricing. A three-seat team pays roughly $105 a month on Plain Foundation versus roughly $87 on Intercom Essential plus $0.99 per Fin resolution.

### How much does a support desk cost for a small team?

Help Scout is the cheapest entry with a free plan and $25 per user per month paid. Plain Foundation is $35 a month for one seat plus $35 a seat after, billed yearly. Intercom Essential is $29 per seat per month, with Fin AI resolutions at $0.99 each on top.

### Is AI support worth per-resolution pricing?

It depends on volume and deflection quality. At $0.99 per resolution, Fin pays for itself against a $29 to $132 seat only if it genuinely closes conversations your team would have handled. Help Scout charges $0.75 per AI Answers resolution. Plain includes 2,000 AI credits a month on Foundation and 15,000 on Scale.


## References

- [1] Plain pricing — https://www.plain.com/pricing (Vendor pricing page, Foundation $35 per month (1 seat, 2,000 credits), Scale $299 (3 seats, 15,000 credits), Frontier custom, verified 2026-10-09)
- [2] Intercom pricing — https://www.intercom.com/pricing (Vendor pricing page, Essential $29, Advanced $85, Expert $132 per seat per month, Fin AI Agent $0.99 per resolution, verified 2026-10-09)
- [3] Help Scout pricing — https://www.helpscout.com/pricing/ (Vendor pricing page, Standard $25, Plus $45 per user per month, AI Answers $0.75 per resolution, verified 2026-10-09)

## Sources

- https://www.plain.com/pricing — checked 2026-10-09, confidence: documented
- https://www.plain.com/pricing — checked 2026-10-09, confidence: unconfirmed
- https://www.intercom.com/pricing — checked 2026-10-09, confidence: documented
- https://www.intercom.com/pricing — checked 2026-10-09, confidence: unconfirmed
- https://www.helpscout.com/pricing/ — checked 2026-10-09, confidence: documented
- https://www.helpscout.com/pricing/ — checked 2026-10-09, confidence: unconfirmed
- https://www.plain.com/blog/startups-customer-support-tools — checked 2026-10-09, confidence: unconfirmed