Grow your audience on X

Posts that fit your niche
in your voice

Not sure what to post on X? Firecrest finds the highest-engagement X posts from other accounts in your niche, writes new ones like them in your voice, and schedules them to your account.

The Posts page with new posts for Theo Marchetti's account. The first was crafted from a high-engagement post and shows that post's engagement.
The Posts page, where every new post lands.

Set up once, run it whenever

  1. The connected X account @theobuilds, with its avatar, name and bio.
    01

    Connect your X account

    Firecrest reads the account you post from and works out your niche.

  2. The setup form filled in from the account: Casual and Storytelling voice, the niche "Indie SaaS built in public" and seven keywords such as saas pricing and late payments.
    02

    Check your profile

    Firecrest fills in your niche, keywords and voice from your account. Check them and change anything before Firecrest writes your first posts.

  3. The Posts page mid-run: a spinner on the Generate button and a banner reading "Finding what's working in your niche".
    03

    Get your posts

    A live X search ranked on real engagement, then a batch of posts built from what came back.

  4. A post's posting-time menu, listing the next slots by day and how many posts each one already holds.
    04

    Queue and reply

    Drop posts into your posting times, and answer the conversations they start.

How Firecrest finds top posts

Your posts are only as good as the posts they learn from. So before writing anything, Firecrest searches X for posts from other accounts in your niche, using the keywords on your profile.

It reads original posts in your language and leaves out reposts and replies to other posts. It also skips any post it has already written from for you, so it never builds your posts from the same post twice. Change your keywords, and the next search follows them.

Recent posts, not last year's advice
The search only looks at recent posts, so posts follow what the niche is responding to now.
Ranked on real engagement
Posts are ranked on the engagement X reports for them. Nothing is estimated, and every post shows the numbers behind it.
Widens when your niche is quiet
Too few hits, and the search casts a wider net. Still too few, and it writes from the profile alone. Every post says which it was.

Three kinds of posts

Two are built from recent top posts in your niche. One comes from you alone.

Blended

Many top posts, written into one

Firecrest reads the whole set of top posts and writes from what they share: the hooks, the structure, the length.

A post blended from many top posts, about moving the due date on Duebird's invoices from the corner to the top.
Drawn from the whole set
The top-ranked posts go into one pass, and the post is written from the patterns they share.
No single post dominates
It's written from what recurs, not from whichever post happens to be loudest.
Labelled with its tier
Each one carries the engagement tier of the set it came from, so a widened search is never mistaken for a strict one.
Crafted

One top post, rebuilt as yours

A single high performer, rebuilt around your subject. You see the real engagement of the post it came from.

A post crafted from a high-engagement post, with that post's engagement shown, about how Duebird's late payment nudge started.
Traces to exactly one post
Written from one source post and no other, so you always know what it was modeled on.
Carries the real numbers
The engagement on the post it came from, as it was when fetched. Never invented.
Borrows the shape, not the words
The prompt forbids quoting, reproducing or closely paraphrasing any source post.
From scratch

Your subject, your voice

No reference post at all. These cover what the popular formats in your niche miss.

A post written from scratch, about a freelancer who sends invoices the day the client approves the work.
No reference post
Firecrest writes these with no top post in front of it.
Covers what the popular formats miss
They take on the subjects the popular formats in your niche leave out.
Ready when your niche is quiet
When the search finds too few top posts, you still get these, written from your profile alone.

Firecrest works out your niche, and you check it

Connect the X account you post from, and Firecrest reads it for your niche and the keywords to search for. You review both before the first search runs.

Keywords you control
They decide which top posts the search finds. Add, remove or rewrite any of them, now or later.
Keyword suggestions
Click Suggest keywords for new ones based on your niche and description. It leaves out any you already have.
The Niche and keywords card of Post settings: the niche "Indie SaaS built in public" and keywords such as saas pricing and late payments.

Run several X accounts from one Firecrest account

Grow your personal following and your brand's, with a different job for each account. Switch between them in the app.

A posting profile per account
Set niche, keywords, voice, words to avoid and topics to avoid for each one.
Separate posts and replies
Each account gets its own posts and replies, written from its posting profile.
Its own schedule
Pick each account's posting times and time zone.

Your plan sets how many accounts you can connect. See pricing

The X accounts card listing Theo Marchetti (@theobuilds), a founder account, and Duebird (@duebirdapp), a product account.

Schedule your posts in advance

Set the times you post at, drop posts into them, and Firecrest publishes on its own.

A week of posting times, three a day. Earlier slots show posts already on X with a View on X link; later ones hold the posts still to go out.
The queue: your posting times, with your scheduled posts in them.
Your times, your time zone
Up to ten slots a day. Nine in the morning means nine where you are.
Drag to reschedule
Move a post to another slot in the week or month view.
Photos and GIFs
Up to four photos or one GIF per post, each with alt text.

Grow in the replies, too

Posting is half of it. Firecrest also finds the conversations worth joining and keeps up with the ones you started.

A post from @nadiaokafor about a client 45 days late on a $2,400 invoice, with a reply written underneath and ready to copy.

Posts from others

A fresh batch of posts from your niche every day, each with a reply written in your voice. Copy it, open the post on X, and paste. A good reply puts you in front of their audience.

Theo's post about raising his price, with two replies waiting, one answered, and a reply box under the first.

Your posts

Every reply to your posts, grouped under the post it answers, unanswered first. Answer from Firecrest and it posts straight to X.

It sounds like you, or it does not ship

Set your tone, languages, emoji, hashtag and punctuation habits, words to avoid and topics to avoid in one place. Every post and every reply follows them.

Post settings with Educational, Casual and Storytelling as the voice and English and Spanish as the languages.
Post settings: the voice every post and reply is written in.

Pick the plan that fits how much you post

Every plan writes posts in your voice and schedules them to X. Higher plans connect more accounts and post more each month.

Core

$25USD / mo
Billed annually$300
  • 1 connected X account
  • 300 posts a month
  • Posts that match the voice in your timeline
  • Scheduled posting to X
  • Attach images and GIFs to any post
  • Email support

Billed annually. Cancel anytime.

Pro

Most popular
$40USD / mo
Billed annually$480
  • 5 connected X accounts
  • 1,000 posts a month across all accounts
  • Posts that match the voice in your timeline
  • Replies written for posts in your niche
  • Scheduled posting to X
  • Attach images and GIFs to any post
  • Email support

Billed annually. Cancel anytime.

Elite

$80USD / mo
Billed annually$960
  • 12 connected X accounts
  • 3,000 posts a month across all accounts
  • Posts that match the voice in your timeline
  • Replies written for posts in your niche
  • Scheduled posting to X
  • Attach images and GIFs to any post
  • API and MCP access
  • Early access to new beta features
  • Priority support

Billed annually. Cancel anytime.

Questions, answered

What it does, what it refuses to do, and where your data goes.

Stop staring at an empty compose box

Connect your account once, then pull a fresh batch of posts grounded in your niche whenever you need one.

Cancel anytime.