Open source alternatives to Mailbutler's Smart Assistant
50 open source Utilities apps to use instead, best rated first.
Top picks
- B
Builder.io
LaunchBuilder.io is a visual headless CMS and development platform that lets teams create, manage, and optimize web pages without constant developer involvement. It integrates with any tech stack (React, Next.js, Vue, etc.) and includes AI-powere
Open source
- E

Elasticsearch
LaunchElasticsearch is an open-source, RESTful search engine designed for scalability, reliability, and easy management.
Open source
- H

Handy
LaunchCross-platform desktop app that transcribes your voice into any text field using a keyboard shortcut, with all processing done locally on your machine.
Open source
- H

Hermes Agent
LaunchCross-platform desktop agent from Nous Research that connects to Telegram, Discord, Slack, WhatsApp, and more, with persistent memory, scheduling, and isolated sandboxing.
Open source
- I

InfluxDB
LaunchInfluxDB handles high-velocity, high-resolution time series data at scale, built for telemetry, edge devices, IoT, and physical AI workloads.
Open source
- K

Kitty
LaunchHigh-performance terminal emulator with GPU acceleration, graphics support, and advanced scripting capabilities for developers and system administrators.
Open source
More Utilities apps
About Mailbutler's Smart Assistant
Mailbutler's Smart Assistant
Compose, respond, and summarize emails effortlessly based on keywords
Take control of your inbox with email tracking, mail merge, professional signatures, and team collaboration tools that help you get more done. Mailbutler helps professionals and teams stay productive across Apple Mail, Gmail (in Safari and Chrome), and Outlook.
- Made by
- Mailbutler GmbH
- Category
- Utilities
- Website
- mailbutler.io


