F5Bot vs ReplyAgent in 2026: free mention alerts vs paid managed-account comment posting
F5Bot emails you for free within minutes of a Reddit or Hacker News mention and stops there. ReplyAgent goes further and posts AI-drafted comments on your behalf through pre-warmed accounts, for $79 a month plus per-comment fees.
F5Bot
ReplyAgent- F5Bot only monitors Reddit, Hacker News, and Lobsters and never posts. ReplyAgent actively drafts and publishes AI-generated comments on Reddit through pre-warmed managed accounts.
- F5Bot's free tier costs $0 with no credit card required. ReplyAgent's Basic Plan starts at $79/mo (or $699/yr) before per-comment and per-post add-on fees.
- ReplyAgent layers Google ranking analysis on top of monitoring, prioritizing Reddit threads that already rank on page one of Google. F5Bot has no ranking-aware prioritization; every keyword match is treated equally.
- ReplyAgent's managed-account posting sits in a gray area of Reddit's terms of service, since Reddit prohibits coordinated inauthentic behavior. F5Bot carries no such risk because it is read-only.
- ReplyAgent includes UTM tracking and ROI measurement that ties Reddit comments to on-site conversions. F5Bot has no attribution features at all.
- F5Bot's REST API is gated to the Ultra plan at $58.33/mo. ReplyAgent has no API access on any plan.
F5Bot and ReplyAgent get grouped together because both watch Reddit for brand-relevant conversations, but they stop at very different points. F5Bot is a keyword alert service: it tells you a mention happened and lets you decide what to do about it. ReplyAgent decides for you, drafting an AI comment and publishing it through a pool of pre-warmed Reddit accounts with established karma, then tracking the resulting clicks with UTM tags. One is a free notification layer, the other is a paid execution engine that takes on Reddit's terms-of-service risk so you do not have to write the reply yourself. Anyone comparing the two is really deciding how much of the engagement work they want a tool to take off their plate, and how comfortable they are with managed-account posting to get it.
The tools at a glance
F5Bot
Know within minutes when your brand gets mentioned on Reddit, Hacker News, or Lobsters
F5Bot has done one job since 2017: watch Reddit, Hacker News, and Lobsters for the keywords you specify and email you within minutes of a match. There is no posting, no drafting, no account management, just a fast, reliable notification when your brand, product, or a competitor comes up in conversation.
The free tier is not a stripped-down teaser. It requires no credit card and covers the core alerting workflow that most solo founders and small teams actually need. Paid tiers add subreddit and co-occurring-term filtering, RSS and JSON feeds, and on the Ultra plan, natural-language semantic alerts plus a REST API, webhooks, and Slack or Discord routing.
What F5Bot deliberately leaves out is any form of engagement. It will tell you a thread exists; writing the reply, deciding whether to post it, and managing the account you post from are entirely on you. That keeps the tool free of platform risk, but it also means it cannot replace a tool built for actually publishing on Reddit.
| Feature | Free $0 | Power $14.17/mo | Ultra $58.33/mo | Enterprise Contact |
|---|---|---|---|---|
| Platforms covered | Reddit, HN, Lobsters | Reddit, HN, Lobsters | Reddit, HN, Lobsters | Reddit, HN, Lobsters |
| Advanced filtering | No | Yes | Yes | Yes |
| AI semantic alerts | No | No | Yes | Yes |
| REST API & webhooks | No | No | Yes | Yes |
| Slack & Discord routing | No | No | Yes | Yes |
ReplyAgent
AI Reddit comment automation with pre-warmed accounts and UTM tracking
ReplyAgent monitors subreddits around the clock, but the monitoring is only the setup step. Once it finds a relevant post, especially one already ranking on Google, it generates an AI comment and publishes it through one of a pool of pre-warmed Reddit accounts with genuine karma histories, rather than leaving that work for a human.
The pre-warmed account system exists because fresh accounts posting branded content get flagged fast. Using aged accounts with real history reduces that risk without eliminating it, and ReplyAgent is upfront that this approach falls into ambiguous territory under Reddit's rules against coordinated inauthentic behavior. Every comment carries a UTM tag, so the platform can report back which threads actually drove clicks and conversions.
Pricing separates discovery from execution: the $79/mo Basic Plan covers monitoring, Google ranking analysis, and comment generation, while actually publishing costs $4 per comment or $8 per post on top. There is no API, so ReplyAgent has to be used through its own interface rather than piped into another workflow.
| Feature | Basic Plan $79/mo (or $699/yr) | Comment Add-On $4 per comment | Post Publishing Add-On $8 per post |
|---|---|---|---|
| Subreddit monitoring | ✓ | N/A | N/A |
| Google ranking analysis | ✓ | N/A | N/A |
| AI comment generation | ✓ | Included | N/A |
| Comment posting | ✗ | ✓ | N/A |
| UTM tracking | ✓ | ✓ | ✓ |
| API access | ✗ | ✗ | ✗ |
Head-to-head feature comparison
| Feature | F5Bot | ReplyAgent |
|---|---|---|
| Primary function | Keyword mention monitoring and email alerting | Reddit monitoring plus AI comment drafting and posting |
| Platforms covered | Reddit, Hacker News, Lobsters | Reddit only |
| Posts on your behalf | No | Yes, via managed pre-warmed accounts |
| Google ranking prioritization | No | Yes, surfaces posts already ranking on Google |
| UTM / ROI tracking | No | Yes, UTM-tagged links with ROI reporting |
| Pre-warmed account management | Not applicable, read-only | Yes, pool of aged accounts with established karma |
| AI-generated comment drafting | No | Yes, included on all tiers |
| Team routing (Slack / Discord) | Yes, Ultra plan | No |
| Free tier | Yes, genuinely functional, no credit card required | No |
| API access | Yes, REST API and webhooks on Ultra | No |
| Platform ToS risk | None, read-only monitoring | Gray area, managed-account posting risks Reddit bans |
| Starting price | Free | $79/mo |
Which should you choose?
F5BotReplyAgentF5BotReplyAgentF5BotReplyAgentThe two tools rarely compete for the same budget line because they solve different halves of a Reddit program. F5Bot's entire value is that it costs nothing and touches nothing, so there is no platform risk to weigh. ReplyAgent's value is that it removes the manual work of writing and posting replies, and that convenience is exactly what introduces both the compliance risk and the $79-plus-fees price tag. A brand running an active Reddit strategy will likely still want a free monitoring layer even if it also pays for a posting tool like ReplyAgent.
Bottom line
Start with F5Bot regardless of what else you use. It costs nothing, carries no platform risk, and covers the baseline need of knowing when your brand comes up. Add ReplyAgent only if you have already decided you want Reddit comments posted automatically rather than by a person, and you have accepted that managed-account posting can get flagged. Teams uneasy with that risk are better off using F5Bot's alerts to find threads and replying manually from their own account.
Frequently asked questions
Can F5Bot post replies on Reddit automatically like ReplyAgent does?
No, F5Bot has no posting or commenting capability at all. It is strictly a keyword monitoring and email alerting tool, so any reply to a mention it surfaces has to be written and posted by a person from their own account.
Is ReplyAgent's managed-account posting against Reddit's rules?
ReplyAgent's own documentation acknowledges it operates in a gray area, since Reddit's terms of service prohibit coordinated inauthentic behavior and artificial engagement. Pre-warmed accounts with real karma reduce the chance of a post being flagged but do not eliminate the risk of removal or a ban.
How much does ReplyAgent cost compared to F5Bot's free tier?
ReplyAgent starts at $79/mo for monitoring, Google ranking analysis, and comment generation, then adds $4 per comment or $8 per post to actually publish. F5Bot's core alerting is free with no credit card required, and its most expensive plan, Ultra, is $58.33/mo for AI semantic alerts, a REST API, and Slack or Discord routing.
Which tool is better for finding Reddit threads that already rank on Google?
ReplyAgent is purpose-built for this, since its Google ranking analysis specifically surfaces Reddit posts already ranking on page one of Google before generating a comment. F5Bot has no ranking-aware prioritization; it treats every keyword match the same regardless of how much search traffic the thread receives.
Does either F5Bot or ReplyAgent offer an API for custom integrations?
F5Bot offers a REST API and webhook delivery, but only on its Ultra plan at $58.33/mo. ReplyAgent does not offer API access on any plan, so integrating it into a custom workflow is not currently possible.
Can I use F5Bot and ReplyAgent together?
Yes, since the two tools do not overlap in function: F5Bot for free, low-risk mention alerts and ReplyAgent for teams that specifically want AI-drafted comments published through managed accounts. Many brands running an active Reddit program keep a free monitoring layer running regardless of which posting tool, if any, they pay for.