Comparisons
CometReplyAI vs Spark Mail
Spark by Readdle is a well-known email client with a smart inbox and AI writing features. CometReplyAI isn't an email client — it's an assistant that connects to your existing inboxes and drafts each reply in your voice, across email and messaging apps. Here's how to think about the two.
Bottom line: Spark is an email client you switch to. CometReplyAI works on top of the inboxes you already have, drafting replies in your voice across email and chat. Choose CometReplyAI if you don't want to change email apps — and want chat covered too.
No new email app to learn
Keep Gmail, Outlook, or Apple Mail. CometReplyAI connects to them and drafts your replies, rather than replacing your client.
Email plus messaging
It drafts across Slack, WhatsApp, Telegram, Discord and LinkedIn too — one place for the channels you actually use.
Your voice, every time
Replies are drafted to match your tone and phrasing, ready to review and send.
Calendar and to-dos
Conversations become calendar events and prioritized to-dos automatically.
Frequently asked questions
Do I have to switch email apps to use CometReplyAI?
No. It connects to your existing email and messaging accounts and works alongside them, so you keep the inbox you have.
Does it cover messaging apps?
Yes — email plus Slack, WhatsApp, Telegram, Discord and LinkedIn, in one unified inbox.
Is it free?
Yes, there's a free plan with no credit card required. For Spark's current plans, see Readdle's website.
Is my data private?
Yes. Connections are encrypted, data is isolated per user, and your message contents are never used to train AI models or sold.
Related pages
Start with replies already drafted
Free to start, no credit card required. Connect an account and see your first drafted reply in minutes.