A Plain alternative for founder-led email support

Some support questions are also product feedback. When you’re building the product and answering those emails, keeping the conversation close matters. We built Pipp around that work: a team inbox for customer email, with our AI and yours. Pipp AI, in beta, translates conversations, drafts replies in your style and summarizes them. Your own agent connects over MCP for free and can do nearly everything you can do in Pipp. Plain takes a wider B2B support approach, joining conversations with account context and engineering workflows.

For a team inbox your whole team can use for free, Start using Pipp. The core inbox and agent access are free forever, with unlimited teammates, inboxes and conversations. Pipp AI is free during beta and fairly priced afterward. Plain offers a seven-day trial, not a general free plan. Its plans and billing guide explain the current offer.

The short answer

Plain fits support woven into product and engineering systems. Its pricing table includes Slack, email, in-app channels, customer cards, developer integrations, and AI on Foundation. Higher plans add more channels and operational controls.

Choose Pipp if most customer conversations arrive by email and you want everyone on the team in one inbox without paying per seat. Plain charges per member seat. Pipp adds every teammate for free, and your own AI agent comes along at no cost.

Plain details in this table come from its official pricing page, billing guide, product page, customer-card documentation, and AI credit guide, checked September 24, 2026. AI, agent and pricing details were checked again on October 20, 2026, against its credits documentation and guide to the MCP server.

Where the two approaches part ways

Plain treats support as part of a B2B product’s infrastructure. Customer cards call your own API for account context, and its product page describes workflows tied to customer and product data. If your team handles an account question by checking a tenant, a deployment, and a Linear issue, those connections are the point of the tool.

Pipp starts from the conversation. Everyone sees the email, knows who is handling it, and writes back together. Assignment, internal notes and Open, Later and Closed states keep the team in step, and live presence shows who is looking at what. A command palette, keyboard shortcuts and 10-second undo send keep replies fast. The app speaks 30 languages, and Pipp AI lets each teammate read and write in their own.

What the prices actually cover

Plain’s billing guide prices plans per member seat per month, in US dollars. Annual billing lowers the seat price by $10 on Foundation and $40 on Horizon. Viewer seats are free on every plan. These are plan prices, not a like-for-like quote for both products. Plain changed these prices after our September check, when Foundation was $35 per month for one seat.

For two people on Foundation, the seat cost is $90 per month on annual billing, before any extra credits. Foundation allows two email addresses and 25 Slack channels; Horizon allows ten email addresses and unlimited Slack channels. Plain offers a seven-day trial without a credit card, rather than a permanent free plan. Its pricing page also mentions a startup program at 50% off, which needs Plain’s approval. On Pipp, two people, ten people and any number of inboxes all cost nothing for the core.

Plain’s credits documentation says Ari uses 100 credits per thread it resolves, Sidekick 15 to 300+ credits per action and connected agents 15 credits per assignment or discussion. Included credits expire at each monthly reset. Top-ups cost $10 per 1,000 credits and don’t expire. When credits run out, those features stop until you add more; Ari hands its threads to your team. On top-up credits, one Ari resolution works out to about $1. Pipp AI is free during beta and fairly priced afterward. We haven’t set that price yet, so a total AI cost comparison isn’t possible today. Your own agent on Pipp has no credit meter at all.

On September 24, 2026, Plain’s pricing table listed a 12-hour customer-card cache on Foundation and a 15-second cache on higher plans. On October 20 it listed 15-second customer-card data freshness without a clear plan split, so check the current table for your plan.

Who should keep Plain

Keep Plain if your customers expect help in Slack or inside your app today, or if customer cards pull plan and account details from your own systems. Keep it too if you want an AI agent answering customers on its own. Ari resolves threads, while Pipp AI never sends a reply. Plain’s pricing table shows SLAs, escalation paths, reporting, and other controls on higher plans.

Why teams choose Pipp

Pipp is built for the founder who still reads the customer replies, and the teammates who join as the inbox grows. Invite all of them. There are no seat prices, and the core inbox stays free forever.

Pipp AI is in beta. It translates conversations so each teammate reads and writes in their own language and the customer gets theirs. It drafts replies in each person’s writing style and summarizes long conversations. It’s free during beta and fairly priced afterward. It’s off by default, and an owner or admin turns it on in Settings → AI.

Your own agent connects over MCP at no cost. Pipp works with any MCP agent, including Claude, ChatGPT (Dots), Codex, Grok and Grok Bot. It works as you, with the access you approve, and can do nearly everything you can do in Pipp: set up the workspace, domain and inboxes, invite teammates, assign, snooze and close conversations, write notes, and draft and send replies. Your teammates see what it did. Your own code can call the same 72 operations over an HTTP API. Plain’s MCP server does a similar job for Plain, on a paid seat. With Pipp, it comes with the free core.

What comes next

Chat is already in the works, and more is coming soon.

Switching from Plain

There’s no automatic Plain importer yet, so run both side by side while you switch. Pipp is free, so that costs nothing. Plain documents retrieving thread messages and notes through its GraphQL API, with pagination for collections. It also says there is no built-in thread PDF export or export button on the thread timeline. Keep Slack and in-app conversations in Plain while you do.

Frequently asked questions

Is Pipp a complete Plain replacement?

For email support, Pipp gives your whole team a shared inbox, with free agent access and Pipp AI in beta. If your team depends on Plain’s Slack channels, customer cards or SLA tools, keep Plain for that work.

Does Plain have a free plan?

Plain lists a seven-day trial without a credit card, not a general free plan. Its Foundation plan costs $45 per seat per month on annual billing, or $55 monthly. Plain’s pricing page has the current terms.

What will Pipp’s AI cost?

Pipp AI is free during beta and fairly priced afterward. We’ll tell you before Pipp AI becomes paid, and you decide whether to subscribe. Our core inbox is free forever, and so is connecting your own AI agent.

Can Pipp handle customer Slack channels?

Pipp handles email today. Chat is already in the works, and more is coming soon. Plain already lists Slack channels in Foundation, with plan limits on its pricing page.

When can my team use Pipp?

Today. Sign up free, add your domain and set up your inbox, then answer customer email with your team.

For now, each account can create up to 3 workspaces per day. Each workspace can send up to 100 recipient deliveries per day.

Each recipient in To or Cc counts separately. An email sent to 2 people in To and 1 in Cc uses 3 deliveries. Both daily limits reset at 00:00 UTC.

If you need the limit removed, email us at hello@pipp.so.

Pipp AI is in beta and off by default. An owner or admin can turn it on in Settings → AI. Your own agent can connect at any time. Start using Pipp.

Bring the whole team into one inbox

Stay close to the customers using what you build. Pipp is ready today, with our AI and yours. Core inbox and agent access: free forever, for unlimited teammates and inboxes. Pipp AI: free during beta, fairly priced afterward.

Start using Pipp ↗

Sources

We publish this comparison. Pipp is a product of Telesoft AG, a Swiss company. Plain’s cited pages were checked on September 24, 2026, and AI, agent and pricing claims again on October 20, 2026. Verify current prices and terms before deciding. Agent and MCP claims were rechecked on October 27, 2026.

• Plain pricing, for plans, channel limits, features, AI credits, top-up prices, and trial
• Plain plans and billing, for per-seat annual and monthly prices, seat ranges, viewer seats, and trial
• How Sidekick credits work, for allowance resets, extra credits, and pause behavior
• Plain product and customer cards, for developer-facing support and API-backed customer context
• Thread export guidance and GraphQL pagination, for the documented API route and export limits
• How Plain credits work, for credit costs of Ari, Sidekick and connected agents, resets and top-ups
• Plain’s MCP server documentation, for supported clients, sign-in and permissions