Google Gemini is entirely free and allows for unlimited questions. It also has the advantage of being integrated with Google search, thus providing real-time information.
Microsoft Copilot integrates well with Microsoft products, especially Edge, and is accessible directly from the app menu.
Jasper.ai is a conversational AI engine that uses large language models developed by OpenAI, Google, Anthropic, and others, including their own customized model.
Otter.ai can be used to record and automatically transcribe both in-person and virtual meetings.