Syften is a solid firehose: it monitors Reddit, Hacker News, Indie Hackers, GitHub, X, forums and a dozen more, and mails you the matches. The catch is that keyword matches are not opportunities. Karmy watches Reddit only, decides which threads are worth your reply while they are still young, and hands you the comment written.
Prices and features read from the vendor's own public pages, checked August 2026. Syften is a trademark of its owner; Karmy is not affiliated with it.
An inbox with sixty matches a day dies in a month. Karmy sends the two or three threads where someone is actually asking for a product like yours, and stays quiet the rest of the time.
Finding the thread is half the job. Karmy writes the reply in your product voice so you can edit it and paste it in two minutes, before the thread fills up.
A thread is read in its first hours. Karmy surfaces the fresh ones with few comments, which is exactly where a reply still gets seen.
No new dashboard, no filter syntax to maintain. It arrives in Telegram and you act from there.
You genuinely need to hear every mention across Hacker News, GitHub, Stack Exchange, podcasts and forums, and you are happy to triage them yourself. That is a real job, and Syften does it well. Karmy is narrower on purpose: Reddit, buying intent, and the reply.
Karmy starts at €9/mo and Syften at $29.95/mo on its Entry plan. Both offer a free trial: 10 days on Karmy without a card, 14 days on the Syften PRO plan.
No. Karmy is Reddit only, on purpose. If your buyers are on Hacker News, GitHub or niche forums, Syften covers far more ground.
No. It finds the thread and writes the draft; you edit it and post it from your own account, which is what keeps the account safe.
Yes, on the Growth plan a webhook sends each one to Slack, your CRM, a spreadsheet or your own code.
A ping while the thread is still young, with the draft written. You edit it and post it yourself.
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