Replies on WhatsApp, Instagram, Messenger and email with your store's data. Steff connects your ecommerce, ERP or app and writes in your voice, 24/7.
heysteff is the AI customer support platform for your ecommerce: connect your store, ERP, CRM or internal app and Steff sits between your systems and your messaging channels, omnichannel. It understands the full customer context — orders, stock, shipments, history — and replies in your tone. No IT project required.
Orders, changes and shipping, from your data.
Recommends and closes inside the chat.
Writes on the right channel, without spam.
Hands the conversation to a person when it should.
Writes when a checkout is left open.
Orders, changes and shipping, from real data.
Replies on the channel the customer used.
Design conversations that fire real actions in your systems. Steff hooks every step to tools — from a private API to a shell script. If your system speaks HTTP, Steff can drive it.
Customer writes · cart abandoned · order webhook · scheduled cron.
Steff loads history, customer profile, stock and business rules.
Picks tone, next action, which tool to run and which channel to reply on.
Creates checkout, schedules nudge, drops an internal note, calls your API or escalates.
Every outcome — sale, resolved ticket, no-show — feeds back into Steff.
No code, no cryptic prompts. Upload your material, set the tone with sliders and tell it what to do in each scenario. Steff grades itself weekly and shows you what it learned.
Connect your account and we'll process your last 5,000 conversations to clone your tone. You flag the "gold" replies, the ones to avoid, and Steff uses them as a north star.
We charge per resolved conversation (not per message, not per seat). Start free with the Free plan to see if Steff fits your workflow, no card required. Cancel anytime.
A real trial with your own WhatsApp.
To start handling support for real, no friction.
For ecommerce and service brands that already live in messaging.
Multi-brand, multi-country, big teams, no caps.
↳ monthly prices in USD · Free plan: 50 conversations/month, 1 channel, pauses at the cap · a "conversation" = 1 customer handled within 24h on any channel · overage $0.5 / $0.4 / $0.3 per plan · 20% off on annual
No. Steff takes 70-90% of the repetitive load and frees your team for the cases that move the needle: VIP customers, serious complaints, big sales. You decide what always escalates.
As long as your system exposes an HTTP API (or can fire webhooks), Steff connects. We ship a native Shopify integration, and a tool builder that connects WooCommerce, TiendaNube, HubSpot, Defontana and everything else.
Yes. We help you get your verified WhatsApp Business API number with no friction. We also work with numbers you already have on another BSP (Twilio, 360dialog).
Very. You can pause per conversation, per channel, per workspace, or globally. And if someone on your team replies from the native Instagram or Messenger app, Steff detects the "echo" and pauses itself so it never steps on a human reply.
Yes. Servers in regions you pick, encryption in transit and at rest, no training of global models with your data. We follow GDPR and Chilean data protection law best practices.
Starter is live the same day. Pro, 3–7 days depending on integrations. Max depends on scope — we average 2–3 weeks with dedicated onboarding.
No. heysteff is an AI agent that reasons over the customer's real context (orders, stock, history) and uses tools — not a fixed decision tree. It replies in natural language, in your brand's tone, and only escalates to a human when it should.
Yes. You can choose the LLM provider per workspace among Anthropic, OpenAI, DeepSeek and OpenRouter, based on what you prioritize: cost, speed or reply quality.
Yes. The agent books, reschedules and cancels appointments right in the conversation, with Google Calendar sync and configurable calendars depending on your plan.
Yes. heysteff connects to Facebook Lead Ads, triggers automatic qualification flows, and organizes leads in a funnel inside the same workspace.
The core heysteff agent connects to your store via direct OAuth, without going through the Shopify App Store. heysteff Reviews (our reviews module) is a published Shopify App Store app, separate from the core agent.
MCP (Model Context Protocol) is an open standard created by Anthropic. heysteff's MCP server lets you configure your workspace — agent, flows, tools, channels — from your own AI, in addition to the dashboard.
Yes. It transcribes voice notes (speech-to-text) and has vision: it reads images and payment receipts customers send, so it can reply with real context.
You're billed per resolved conversation, not per message or per seat. There's a Free plan (50 conversations/month, no card required) and paid plans starting at $149 USD/month (Starter), $299 (Pro) and $549 (Max), each with more channels, users and tools included.
Yes. heysteff is multilingual and multi-country: it serves businesses in LATAM, the US and Europe, and the agent replies in whatever language the customer writes in.
Create your space and connect a channel now, without waiting for a call. If you would rather see it with someone, tell us and we will book 30 minutes. We reply the same business day. Create my space.