Best Reddit alert tools
The best Reddit alert tools in 2026
Updated 31 August 2026 · figures checked against each vendor's own pricing page
In short
Judge a Reddit alert tool on three things: what arrives, where it can be sent, and what stops it arriving. Price is the fourth, and it is the one most comparisons start and finish with.
Six tools are compared below on the first three, at each one's cheapest paid plan, with every figure read off that vendor's own pricing page. Redwatcher is a Reddit monitoring tool that scores every keyword match for relevance before it alerts you: $29 a month, all four destinations, and no cap on what reaches you.
What actually arrives, and where it can go
Destinations are quoted for the cheapest paid plan, because that is the one most people buy and it is where the difference is largest. Several tools include a chat integration or a webhook only a tier or two above their headline price.
| Tool | From | Destinations at the entry price | What caps what reaches you |
|---|---|---|---|
 Redwatcher | $29 | email, Slack, Telegram and webhooks on every plan | no per-keyword and no per-day cap |
 Octolens | $199 | Slack, email, API, webhooks and MCP on every plan | 15,000 mentions included, then $0.013 each — metered rather than stopped, unless you set a spend cap |
 Syften | $29.95 | email at entry; Slack and API from $49.95; webhooks on PRO at $119.95 | 100 community results a day on entry, 200 and 500 above it |
 F5Bot | free tier, then $9.99 | email at $9.99; Slack from $49.99; webhooks and the API from $214.99 | 10 / 30 / 100 / 500 alerts per keyword per day, and the keyword is switched off over the cap |
 SubWatch | $9 | SMS and a Chrome extension | no cap published |
 SubLookout | $12 | alert destinations not published | structurally bounded: 10 monitors of 20 subreddits and 20 keywords |
Tool by tool
Each card lists the same four facts at that tool's cheapest paid plan: what the plan includes, where alerts can be sent, what limits how many reach you, and whether anything judges a match before it is sent.
| At the cheapest paid plan | |
|---|---|
| What the entry plan includes | 25 keywords and 25 subreddits at $29, and every feature on every size |
| Destinations at that price | email, Slack, Telegram and webhooks on every plan |
| What caps what reaches you | no per-keyword and no per-day cap |
| Judged before it is sent | every match scored 0 to 100 on every plan, with the reasons attached and no usage billing |
| At the cheapest paid plan | |
|---|---|
| What the entry plan includes | 10 keywords at $199 a month ($159 billed annually), then $10 for each one after |
| Destinations at that price | Slack, email, API, webhooks and MCP on every plan |
| What caps what reaches you | 15,000 mentions included, then $0.013 each — metered rather than stopped, unless you set a spend cap |
| Judged before it is sent | AI filters every mention on every plan, banded high / medium / low |
| At the cheapest paid plan | |
|---|---|
| What the entry plan includes | 3 community filters and 100 results a day at $29.95 |
| Destinations at that price | email at entry; Slack and API from $49.95; webhooks on PRO at $119.95 |
| What caps what reaches you | 100 community results a day on entry, 200 and 500 above it |
| Judged before it is sent | AI filtering from $49.95, one tier above the entry price |
| At the cheapest paid plan | |
|---|---|
| What the entry plan includes | 20 keywords at $9.99 |
| Destinations at that price | email at $9.99; Slack from $49.99; webhooks and the API from $214.99 |
| What caps what reaches you | 10 / 30 / 100 / 500 alerts per keyword per day, and the keyword is switched off over the cap |
| Judged before it is sent | AI filtering from $49.99, capped at two filters, token use billed above $10 a month |
SubWatch
Reddit only · no scoring
| At the cheapest paid plan | |
|---|---|
| What the entry plan includes | allowance not published |
| Destinations at that price | SMS and a Chrome extension |
| What caps what reaches you | no cap published |
| Judged before it is sent | no relevance scoring |
SubLookout
Reddit only · no scoring
| At the cheapest paid plan | |
|---|---|
| What the entry plan includes | 20 keywords across 20 subreddits at $12 |
| Destinations at that price | alert destinations not published |
| What caps what reaches you | structurally bounded: 10 monitors of 20 subreddits and 20 keywords |
| Judged before it is sent | no relevance scoring |
How we checked
Read off their own pages. Every price, destination and limit above comes from that vendor's own pricing page, read tier by tier.
Dated. 30 August 2026 and 21 August 2026. Prices change, and a figure here is only as good as its read date.
Not scored on anything unpublished. Where a vendor does not state a limit, the table says so, and we do not guess at a number.
What a daily cap actually throws away
An alert tool with a daily or per-keyword limit is making a decision you never get to see. Nothing about relevance decides which matches it drops. It drops whatever arrived once the allowance had run out, and on a busy week for a term you care about, that is exactly when the one you needed turns up.
The other way to do it is to judge each match and let you set the bar. Redwatcher scores every match from 0 to 100 for relevance in context and sends what clears the score you chose. Everything below it is kept and counted in the app.
RedwatcherReddit monitoring, every match scored
RedwatcherStart free Seven days, no card. From $29 a month after. What an alert contains
What the entry price includes
The other half of the same question, because an allowance that runs out works as a cap once it does.
| Tool | From | What the entry plan includes |
|---|---|---|
| Redwatcher | $29 | 25 keywords and 25 subreddits at $29, and every feature on every size |
| Octolens | $199 | 10 keywords at $199 a month ($159 billed annually), then $10 for each one after |
| Syften | $29.95 | 3 community filters and 100 results a day at $29.95 |
| F5Bot | free tier, then $9.99 | 20 keywords at $9.99 |
| SubWatch | $9 | allowance not published |
| SubLookout | $12 | 20 keywords across 20 subreddits at $12 |
Which one to pick
- You want every destination on the cheapest plan. Redwatcher includes email, Slack, Telegram and webhooks at $29, with no per-keyword or per-day limit.
- You are watching a term that gets busy. What matters is what happens on the day it does. A per-keyword daily cap answers that by dropping whatever arrived last. A score answers it by relevance.
- You need alerts routed into your own system. Check which tier carries webhooks. On several tools it is one or two tiers above the headline price.
- You are tracking more than a hundred keywords or subreddits. That is a custom plan here, and worth pricing against the per-keyword and per-mention charges some tools add above their allowance.
Tools that are not in this table
- Tools that write replies for you. Some Reddit tools draft or post replies on your behalf. That is a different product with a different risk, because posting under your name carries account consequences that have been publicly reported, and it is not what this page compares.
- General media suites. They publish little about Reddit specifically, and a comparison built out of gaps would say more about what we could read than about their product.
Reddit alert tools: questions people ask
What is the best Reddit alert tool?
The one whose entry plan sends where you work and does not cap what reaches you. On both counts Redwatcher includes email, Slack, Telegram and webhooks at $29 with no per-keyword or per-day limit, and scores every match before sending it. The full scoring across five criteria is on the ranked comparison.
What do Reddit alerts cost?
Redwatcher is $29 a month for 25 keywords and 25 subreddits, $49 for 50 and 50, and $89 for 100 and 100, with all four destinations and no cap on any of them. The trial runs seven days and takes no card. The table above quotes every other tool at its own cheapest paid plan.
Which Reddit alert tools send to Slack?
Several, but rarely on the cheapest plan, which is why the destination column above quotes each tool at its entry price. Redwatcher includes Slack, Telegram, email and webhooks on every plan.
Do Reddit alert tools cover comments?
The Reddit-native ones do, and it matters: most of the conversation you could answer on Reddit happens in the comments, not in the post that started the thread.
Do any of these tools post replies for you?
None of the tools compared here. Some Reddit tools do, and they are left out of this comparison because posting under your name is a different product with a different risk.
Which Reddit alert tools include a webhook?
Redwatcher on every plan, and Octolens on every plan. On the others a webhook sits above the entry tier, which the destination column above states for each one.
How do I set one up?
Add the words, name the subreddits, set the bar, connect a channel and send a test. The five steps are here.
Competitor destinations, caps and allowances on this page are the same figures published beside each sub-score on the ranked comparison, read from each vendor's own pricing page in August 2026, and may have changed since. Redwatcher is not affiliated with any tool listed here. Reddit is a trademark of Reddit, Inc., and Redwatcher is not affiliated with or endorsed by Reddit, Inc.