Lemni
Lemni BV · Voice & Language · Marketing
Lemni is an AI agent platform and customer support automation tool for building custom agents that handle email, phone, and chat support in any language.
About Lemni
What Is Lemni
Lemni is an AI customer service platform and AI helpdesk built around AI agents instead of traditional rule-based chatbots. You describe what an agent should do in plain instructions, connect it to tools like Gmail, HubSpot, or Stripe, and it handles inbound requests on its own. The company is based in Amsterdam and launched its public beta in February 2025, backed by a $3.5M pre-seed led by Sequoia.
The pitch is a familiar one for anyone running support: customers want fast, personal answers, but hiring enough people to give them is expensive. Lemni tries to close that gap through customer experience automation, letting a small team run an AI workforce. Agents answer questions, issue refunds, book meetings, and open GitHub issues, while your team watches from a shared inbox.
The main limit is control. Agents are capable enough to take real actions, so Lemni puts approvals in front of anything risky. You stay responsible for reviewing what they do, especially early on. The platform also runs on third-party language models, so performance and cost track whatever model you pick.
Getting Started
- Sign up at lemni.com and create a workplace for your team.
- Write instructions for an agent, then pick the actions it can take, like sending an email or creating a contact.
- Train the agent by uploading files or linking your FAQ and product pages.
- Connect your tools with OAuth so the agent can work inside Gmail, HubSpot, or Stripe.
- Watch requests arrive in the inbox, approve or decline actions, and refine the instructions over time.
Product Information
A quick look at Lemni's pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- Small support teams that handle more tickets than they can staff
Tasks
- Email and phone support
- Revenue recovery and order help
- Internal workflows
Scenarios
- A SaaS startup fielding the same billing and login questions every day
- A small shop running support across time zones
- A growing team that wants oversight before full automation
Key features
Custom AI Agents With Plain Instructions
These are no-code AI agents, so you build one by writing what it should do in normal language rather than dragging nodes around a flowchart. Add its skills one at a time, like answering a question or drafting an email, and pair each with the actions it can take. Real-time collaboration means your whole team can shape the instructions together.
Multichannel Support Across Email, Phone, and Chat
Agents work on more than one channel. As an AI phone agent, Lemni takes calls as well as inbound email, and responds on platforms like Shopify and Stripe and through webhooks. This matters because most customers move between channels, and a tool that only does email forces you to bolt on other systems for the rest.
Plug-and-Play Action Store
Lemni ships with a store of ready-made actions for tools your team already uses, from drafting emails in Gmail to creating contacts in HubSpot and booking events in Calendly. A code editor is there for anything custom. The point is that your agents work inside your existing stack instead of asking you to migrate to a new one.
Choice of Language Model
You pick the model that powers each agent and switch between them in seconds. Options include models from OpenAI, Anthropic, and Mistral, such as GPT-4o, Claude 3.7 Sonnet, and Mistral Large. Since the platform charges at cost for its own layer, the model you choose is the main driver of what you pay.
Train It on Your Business
Agents learn from your own material. Upload PDFs, manuals, spreadsheets, and images, or paste links to your FAQ and marketing pages, and Lemni handles the rest. Each customer gets a single source of truth, so agents understand the journey behind a request rather than treating every message as a blank slate.
Shared Inbox With Human Approval
Every interaction lands in a shared inbox where your team can read the history, assign threads, and approve or decline the actions agents want to take. This is what makes the tool usable before you fully trust it, since nothing risky happens without a person seeing it first.
Pros and cons
Pros
- Agents can take real actions, not just answer questions, so refunds, bookings, and contact creation actually get done.
- The plug-and-play action store connects to tools like Gmail, HubSpot, and Stripe without heavy setup.
- Human approval in the inbox lets teams adopt AI gradually instead of handing over full control on day one.
- Supports a wide range of languages, which helps teams serving customers across regions.
Cons
- Pricing scales with interactions, so heavy support volume can push costs up over time.
- The platform depends on third-party models, meaning quality and speed shift with whichever model you select.
- Teams that want deep, industry-specific tuning may run into the ceiling of what instructions and uploaded files can teach.
- You still need someone reviewing the inbox, so it reduces headcount pressure more than it removes it.
Frequently asked questions
Lemni builds AI agents that handle customer interactions for you. You write instructions, connect your tools, and the agents answer emails, take calls, and complete tasks like refunds or bookings while your team supervises from an inbox.
Related content
Explore related tools, skills, and articles for Lemni.
Lemni Alternatives
Foley
Hanamori Labs, LLC · Voice & Language · Productivity · AI AssistantFoley is a voice to-do list that turns a spoken sentence into a filed task, complete with project, date and time, then helps you plan the day around what is already there.
HireKey
HireKey · Voice & Language · Productivity · LeaningHireKey is an AI job search copilot built by a former tech recruiter. It checks role fit, tailors resumes, runs interview practice and tracks every application.
Fluence
Yay Software (Yannick Huchard) · Writing · Voice & Language · ProductivityFluence is an Android app that reads PDFs, EPUBs, Word files and web articles aloud, follows each sentence as it speaks, and answers questions about the text on the phone itself.