Overview

KWatch.io is a web and API service for spotting sales signals, customer feedback, competitor activity, and broader market conversations. Its strongest distinction is the combination of keyword alerts with tracking for individual Reddit and Hacker News discussions: it can notify you when someone comments in a conversation, not just when a keyword appears elsewhere.

The service says monitoring refreshes per second, with alerts usually arriving within seconds and occasionally taking up to a minute during temporary congestion. That cadence is useful for timely response, though it is not a guarantee of instant delivery. Keyword filters can include or exclude terms and restrict language, helping reduce irrelevant matches.

Key features

Source coverage and conversation tracking

Keyword monitoring covers Reddit, X, Hacker News, LinkedIn, Facebook, and YouTube. Conversation tracking is narrower: it applies to Reddit and Hacker News posts and comments. This makes KWatch.io a better fit for community-led monitoring than for teams that need complete comment coverage across social platforms.

There are meaningful source limitations. LinkedIn and Facebook comments are not monitored, Facebook groups must be public, and YouTube alerts check titles and descriptions rather than audio. Instagram and TikTok are not supported. Teams whose audiences or campaigns depend on those sources should look elsewhere or treat KWatch.io as only part of their monitoring setup.

Analysis and alert delivery

AI classifies detected keyword sentiment as positive, negative, or neutral. That can help triage feedback and market discussion, but the stated capability is sentiment categorization rather than a broader interpretation of each conversation.

Alerts can arrive by email, Slack notification, or API webhook, with API access also offered. Webhooks send each result as a JSON-encoded HTTP POST, making them suitable for systems that accept custom POST requests. A hosted MCP server can connect compatible clients—including Claude, Claude Code, Cursor, and VS Code—using a KWatch API key. The maker says webhook and MCP traffic use TLS encryption and MCP access can be revoked by revoking that key.

Pricing

KWatch.io has a free plan and paid plans billed monthly. The lower tiers concentrate capacity on Reddit and Hacker News; paid tiers add limited allocations for the other monitored sources. The free tier is a narrow trial of keyword alerts, not conversation monitoring.

Plan	Price	What it includes
Free	0.00 USD per free	2 Reddit keyword alerts, 2 Hacker News keyword alerts, and 0 tracked conversations; basic support.
Essential	19.00 USD per month	20 keyword alerts each for Reddit and Hacker News; 2 each for X and YouTube; 1 each for Facebook and LinkedIn; 2 tracked conversations each on Reddit and Hacker News; AI analysis, filtering, and basic support.
Business	79.00 USD per month	100 keyword alerts each for Reddit and Hacker News; 10 each for X and YouTube; 5 each for Facebook and LinkedIn; 10 tracked conversations each on Reddit and Hacker News; API, webhooks, Slack, MCP, bulk import, team management, and basic support.
Enterprise	199.00 USD per month	500 keyword alerts each for Reddit and Hacker News; 50 each for X and YouTube; 25 each for Facebook and LinkedIn; 50 tracked conversations each on Reddit and Hacker News; API, webhooks, Slack, MCP, bulk import, team management, and advanced support.
Agency (Multi-Client)	Custom pricing	Multi-client management, custom keyword-alert and conversation limits, API, webhooks, Slack, and MCP.

Free is suitable for a small test of Reddit or Hacker News keyword monitoring, but its zero conversation allowance rules out tracking replies to specific posts. Essential is the practical starting point for an individual or small team that needs sentiment analysis, filters, and a modest amount of cross-source coverage; it does not include the listed API, Slack, or MCP integrations. Business is the first tier with those integrations and team management, alongside substantially higher quotas. Enterprise raises those quotas and support level, while Agency is aimed at multi-client work with custom limits.

Platforms

KWatch.io is available on the web and through an API. Its integrations extend alerts into Slack, webhooks, and compatible MCP clients; it is not presented as a native mobile or desktop app.

Who it's for

KWatch.io is a good match for teams monitoring Reddit and Hacker News conversations for customer support needs, sales signals, competitor activity, customer feedback, market intelligence, or campaign impact. The Free and Essential plans suit limited monitoring needs; teams that need shared workflows and integrations will need Business or above. It is a weaker fit when coverage of Instagram, TikTok, private Facebook groups, or social comments on LinkedIn and Facebook is central.

Pros and cons

Pro: Combines keyword alerts with Reddit and Hacker News conversation tracking, so teams can follow replies as well as mentions.
Pro: Email, Slack, webhook, API, and MCP routes support both straightforward notifications and custom workflows, with the latter integrations included from Business.
Pro: The $19.00 USD per month Essential plan adds sentiment analysis and filtering while retaining a small allocation across all six monitored sources.
Con: Free has no tracked conversations, despite offering keyword alerts on two sources.
Con: LinkedIn and Facebook comments, private Facebook groups, YouTube audio, Instagram, and TikTok are outside its coverage, limiting its usefulness for broad social listening.
Con: The six-source allocations on Essential are small, especially the single alert each for Facebook and LinkedIn.

Alternatives

dig is worth considering for a credit-based option: its free plan includes 10 credits per month, while Pro is 25.00 USD per month for 50 credits and adds influencer vetting, crisis detection, and trend discovery.

Social Searcher may suit someone who wants browser-based monitoring with no registration or login on its free tier, which provides 100 real-time searches per day, 1 monitoring, and 500 saved posts per month.

Brand24 is an option for readers seeking an alternative with web, mobile, and desktop platforms; it is paid, has no free plan, and offers a free trial.

Harken is a free web-based alternative.

Mentionlytics may fit buyers looking for a paid alternative with a free trial and API access; its Basic plan is 49.00 USD per month.

BrandMentions is another paid web option with a free trial; its Starter plan is 99.00 USD per month.

Determ may suit readers seeking a paid service with web and mobile apps; its Focus plan is 99.00 EUR per month.

Awario is a paid web alternative with a free trial; its Starter plan is 29.00 USD per month.

For broader category comparisons, see AI Social Listening Tools and Social Media Listening Software.

Verdict

Choose KWatch.io if your monitoring centers on keyword signals and active Reddit or Hacker News conversations, and you want alerts that can feed team channels or custom systems. Its combination of conversation tracking, sentiment classification, and flexible delivery is compelling at the Essential entry price. Look elsewhere if unsupported networks or comment coverage are essential, or if you need tracked conversations without moving beyond the free tier.

	KWatch.io	MentionWatch
Free plan	Yes	No
Free trial	No	Yes
Paid from	$19/mo	$29/mo
Open source	No	No
Platforms	api, Web	Web
Free plan	Yes	No
Paid from	$19/mo	$29/mo
Sentiment analysis	Yes	Yes

KWatch.io vs MentionWatch

KWatch.io

MentionWatch