If you want a browser extension that works with Twitter, LinkedIn and Gmail to help you get work done on the web, Cosmo is a good option. This AI-powered extension lets you write content, draft emails, respond to tweets and create LinkedIn posts with a click. It supports those three services, along with Reddit and Gmail, so it's pretty adaptable. The free Cosmonaut Basic plan is good for light use, but the Cosmonaut Monthly plan ($3.99/month) adds features like custom prompts and a Wikipedia summarizer.
Another option is Merlin, an AI chat tool that can be used for many tasks on many websites. Merlin has tools like Gmail Email Writer, LinkedIn DM Response Assistant, Twitter Commenter and YouTube Transcription Tool, so it's a good all-purpose tool for professionals. It's available as a free Chrome extension and web app, but premium features are available through paid plans.
If you want a more personal AI assistant, Copilotly offers contextual suggestions and help on a variety of tools like Gmail, Twitter and LinkedIn. It's got a variety of copilots for writing, social media and marketing, so it could be good for professionals and students who want to work more productively. Copilotly is available as a browser extension for Chrome, Firefox, Opera and Brave, and there are mobile apps for Android and iOS.
Last, Voilà is an AI-powered browser assistant that gives you direct access to ChatGPT abilities. It's got tools for writing, brainstorming and research, and integrates with Gmail so you can use it to draft emails. Voilà is focused on privacy, and you can pay for different levels of service, including a free tier with 250 requests, so it's a good option for people who want to use it for personal and collaborative work.