Everything you need to run your business. calendar, invoices, contracts, AI agents and more.
Completely free. No catch.Everything you need to run your business. calendar, invoices, contracts, AI agents and more.
Completely free. No catch.
Seven powerful modules. One unified platform. Zero cost.
Smart scheduling with availability management, booking pages and reminders.
Create, send and track professional offers. Get notified when clients view or accept.
Generate and send invoices. Track payments, set reminders, and manage your cash flow.
Build, send and e-sign contracts. Automated follow-ups and full audit trail included.
Design email sequences, automate outreach and track opens. all in one place.
An intelligent assistant trained on your business. Handles enquiries, qualifies leads and books meetings 24/7.
Autonomous agents that handle repetitive tasks. from lead qualification and follow-ups to reporting and client onboarding. Set them up once, let them run.
We believe great tools should be accessible to every business. Here's how it works.
Create your free account in under a minute. No credit card, no trial limits.
Configure your modules. calendar, invoices, contracts and more. in a guided setup flow.
Start using Tellzer OS for real work: send quotes, sign contracts, automate emails, and let AI handle the rest.
We grow when you grow. Premium services are always optional. the OS stays free, forever.
We built Tellzer OS because we saw businesses struggling with fragmented tools. one app for scheduling, another for invoicing, a third for contracts, and none of them talking to each other.
So we created a single, unified platform that handles it all. Calendar, quotations, invoices, contracts, email automation, an AI chatbot and intelligent agents. everything connected, everything free.
Our mission is simple: give every business the tools that used to be reserved for enterprises with big budgets. No subscriptions, no hidden fees, no lock-in. Just powerful software that works.
Join thousands of businesses already using Tellzer OS. No credit card required, no limits, no catch.
Have questions? and
we are happy to help.