FastReply

AI replies for LinkedIn and Twitter in a single click

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Screenshot of FastReply, AI replies for LinkedIn and Twitter in a single click

What is FastReply?

FastReply is an instagram comment finder tool. Chrome extension that generates on-brand replies to LinkedIn and Twitter posts in one click, with tone controls and monthly reply allowances across three paid tiers.

FastReply is a Chrome extension that drafts replies to LinkedIn and Twitter posts inside the browser. Instead of opening a separate chat window and copying text back and forth, the user finds a post they want to engage with, clicks the FastReply icon, and the tool generates a response that can be edited before sending. The product is built around a single daily habit: commenting on other people's posts as a way to stay visible and build relationships with an audience. The workflow is deliberately short. You select a post, pick a tone (the site names professional, witty and casual as the spectrum), review the generated reply, regenerate it if the first attempt misses, and post. A personal brand memory feature is bundled with the Pro tier, and the Elite tier unlocks unlimited tone styles. The homepage positions consistency as the main growth lever on social platforms, and the tool is designed so that a user who struggles with writer's block or runs short on time can still leave a meaningful comment rather than a generic one. The target user is a creator, consultant or founder who treats LinkedIn or X as a lead channel and wants to keep engagement volume up without blocking out large chunks of calendar time. Testimonials on the site come from a marketing consultant, a startup founder and a content creator, which matches the intended audience. Small social teams could use it too, though the pricing is per user and there is no mention of shared brand settings or team administration. Against alternatives, FastReply is narrower than general writing assistants. It does not write full posts, articles or emails, and it does not try to plan content calendars. The closest comparison is a general-purpose chatbot, which can produce decent replies but requires manual copy and paste and gives no tone presets tied to your profile. FastReply's advantage is living where the conversation happens, and its limitation is that it is useful only if commenting on LinkedIn and Twitter is already part of your routine.

How do you use FastReply?

  1. 1Request early access
    Submit the request access form on the FastReply site. Once approved, you get the details needed to install the extension and start the trial.
    FastReply — Request early access
  2. 2Install the Chrome extension
    Add FastReply to Chrome from the Chrome Web Store listing linked on the homepage. The extension sits in the toolbar and needs no setup beyond signing in.
  3. 3Open a post and click the icon
    Browse LinkedIn or X until you find a post worth engaging with, then click the FastReply icon while that post is on screen.
  4. 4Generate and adjust the reply
    Let the AI draft a response and set the tone you want. Use regenerate if the first draft does not sound like you, then edit the wording by hand.
  5. 5Post and track your allowance
    Send the reply from the platform as usual. Keep an eye on the monthly reply count tied to your Basic, Pro or Elite plan.

Pros and cons

Pros

  • Replies are generated inside LinkedIn and X, so there is no copy and paste between appsAI
  • Tone presets let the same post be answered in a professional, witty or casual registerAI
  • The Chrome extension installs from the Chrome Web Store without a configuration stepAI
  • Pro and Elite tiers add personal brand memory and priority generation for heavier usersAI

Cons

  • Covers only LinkedIn and Twitter, so creators working on Instagram, YouTube or Threads get no benefitAI
  • Reply counts are capped per month on every tier, and overage handling is not explained on the siteAI
  • No team or shared brand settings are described, which limits use for agencies and social teamsAI
  • Access requires requesting early access rather than a direct signup, which adds a wait before first useAI
  • The tool drafts comment replies only and does nothing for original posts or content planningAI

How much does FastReply cost?

Free trial

A 14-day free trial is offered with no credit card required. The homepage pairs it with a request access step, so approval may come before the trial starts.

Learn more

Pricing

Three monthly plans: Basic at $10 for 200 AI replies, Pro at $20 for 500 replies plus priority generation and personal brand memory, and Elite at $40 for 1,500 replies plus unlimited tone styles and priority support. All tiers include LinkedIn and Twitter support and the Chrome extension.

Learn more

Support

Priority support is listed only on the Elite plan. The site gives no other details on support channels or response times.

Integrations

Works on LinkedIn and X (Twitter) through the Chrome extension, which is distributed via the Chrome Web Store. No other integrations are listed.

Features

One-click reply generation for LinkedIn and Twitter posts, tone customization (professional, witty or casual), regenerate option for redrafting, personal brand memory on Pro and above, unlimited tone styles on Elite, and priority generation and support on the upper tiers. All of it runs through a Chrome extension.

Frequently asked questions about FastReply

  • How much does FastReply cost?
    Three monthly plans: Basic at $10 for 200 AI replies, Pro at $20 for 500 replies plus priority generation and personal brand memory, and Elite at $40 for 1,500 replies plus unlimited tone styles and priority support. All tiers include LinkedIn and Twitter support and the Chrome extension.
  • Does FastReply offer a free trial?
    A 14-day free trial is offered with no credit card required. The homepage pairs it with a request access step, so approval may come before the trial starts.
  • How do you use FastReply?
    The walkthrough on this page covers 5 steps: 1. Request early access 2. Install the Chrome extension 3. Open a post and click the icon 4. Generate and adjust the reply 5. Post and track your allowance.
  • What platforms does FastReply support?
    FastReply is available on Browser extension.
  • What does FastReply integrate with?
    Works on LinkedIn and X (Twitter) through the Chrome extension, which is distributed via the Chrome Web Store. No other integrations are listed.
  • What are the limitations of FastReply?
    Covers only LinkedIn and Twitter, so creators working on Instagram, YouTube or Threads get no benefit. Reply counts are capped per month on every tier, and overage handling is not explained on the site. No team or shared brand settings are described, which limits use for agencies and social teams.

Status

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Added10/21/2026

Platforms

Browser extension

Pricing

Free TrialSubscription