412 users asked. We finally shipped dark mode 🌑 But it took 3 weeks — because we rebuilt every single chart from scratch. The details nobody sees = the work that matters most. Drop a 🖤 if you wanted dark mode in your invoicing app #darkmode #saas #buildinpublic #productdesign #indiedev
Buffer API alternative: one prompt in, every network's post out
Buffer's API pushes text you already wrote to one channel per call, billed per channel. PostWire's API writes each network's version from one prompt, then publishes them together — and tells your server when each one went out.
Every Buffer price and feature here was read on Buffer's own pages on Sept 26, 2026, with the link next to it. If they changed since, their page wins.
PostWire and Buffer at a glance
| PostWire | Buffer | |
|---|---|---|
| What you pay for | One business — every network connects on every plan; paid plans post to all of them at once | Per channel (each connected account): $6 on Essentials, $12 on Team, billed monthly |
| Cheapest paid plan | $9 a month (3 businesses) | $6 per channel a month (Essentials; $5 billed yearly) |
| Free plan | Yes — 1 business, 20 posts a month, 2 networks per post, 3 scheduled at a time, no card | Yes — 3 channels; 1 API key, 3,000 requests per 30 days |
| 10 businesses × 5 networks | $29 a month | $300 |
| Writes a different post per network from one idea | Yes — one request writes them all | No — one call posts your text to one channel |
| MCP server for AI agents | Hosted, API key or OAuth 2.1, 21 tools | Hosted, with your Buffer API key; one call per channel |
| X (Twitter) | Yes, on paid plans, through PostWire's X app — no X developer account of your own; X credits included every month (Pro: 150) | Yes |
| Refund or guarantee | 14 days on paid plans | Monthly plans refunded within 7 days, annual within 30 (its refund policy, Oct 5, 2026) |
Where PostWire is better than Buffer
- Two calls post everywhere.
POST /api/generatereturns a native draft for every network from one prompt;POST /api/postpublishes them all. Buffer's API and MCP server post your own text to one channel per call. - All or nothing. Before anything goes out, every network in the request is checked — connection, length, required media — and the request is refused whole if one would fail, instead of publishing to some. Retries are safe with an
idempotency_key(24 hours). - Per business, not per channel. 10 businesses on 5 networks are $29 a month. Buffer bills $6 per channel on Essentials: $300 for 50.
- Signed webhooks for each network's result (
post.published,post.failed,connection.reauth_required), retried for two days, on every plan, plus a public status page with each network's delivery rate.
Who PostWire is for
- You want one request that returns a TikTok caption, a YouTube title, description and tags, a LinkedIn post and more — then one more call to publish them all.
- You'd otherwise pay per channel: 10 businesses on 5 networks is $29 here.
- You want to add it to Claude by signing in with OAuth, or call it from n8n or Make.
10 businesses on 5 networks each: the monthly bill
An agency or a freelancer with ten clients, each on five networks, about 20 posts per client a month. That is 50 connected accounts, which is where the pricing unit decides the bill.
| Tool | How it's counted | Per month |
|---|---|---|
| PostWire Pro | 10 businesses fit in Pro (10 businesses, unlimited posts, fair use 10,000 a month; 10 × 20 posts × 5 networks = 1,000) | $29 |
| Buffer Essentials | 50 channels × $6 (billed yearly: 50 × $5 = $250) | $300 |
Monthly billing in USD, before tax. Source: buffer.com/pricing, read on Sept 26, 2026; PostWire's prices come from the code that bills you.
What “a different post per network” means
Buffer publishes the text you send it. PostWire writes each network's version first — a hook for TikTok, a searchable title and tags for YouTube, a longer first-person post for LinkedIn — and then publishes them.
The idea: Our invoicing app just shipped dark mode. 412 users asked for it, and it took us 3 weeks because we redid every chart.
Dark Mode is Live 🌑 | Why It Took 3 Weeks to Ship
Dark mode is finally live in our invoicing app — and 412 users asked for it before we built a single pixel. #darkmode What looks like a simple color switch was actually a full 3-week rebuild. Every chart, every data visualization, every graph had to be redesigned from the ground up to work in a dark environment. We weren't going to ship something that half-worked. In this video, we walk you through: — Why dark mode in a data-heavy app is way harder than it sounds — How we prioritized this based on real user requests — The chart redesign process, color contrast decisions, and accessibility checks — What we'd do differently next time If you're building a SaaS product or thinking about shipping dark mode yourself, this one's for you. The stuff users never see is usually the hardest work. #buildinpublic #saasdesign Timestamps: 0:00 — Why 412 people finally convinced us 1:30 — The chart problem nobody warned us about 4:00 — Our redesign process 7:20 — The final result
412 users asked for dark mode. We shipped it last week. Here's the part that surprised us: It took 3 weeks — not because dark mode is hard, but because we have charts. Every chart in our invoicing app had to be rebuilt from scratch. Colors that look clean on a white background? They're invisible or eye-straining on dark. Contrast ratios that pass accessibility standards in light mode? Fail completely in dark. So we didn't just flip a CSS variable and call it done. We redesigned every data visualization. Every axis label. Every tooltip. Every legend. Three weeks of work that most users will never consciously notice — and that's exactly the point. We track feature requests in a dead-simple spreadsheet. When dark mode crossed 400 votes, it jumped straight to the top of the queue. No roadmap committee. No prioritization framework. Just 412 real people saying the same thing. The lesson we keep relearning: Listening to users is easy to say and easy to fake. Actually doing it means sometimes rebuilding things you thought were finished. We think that's the job. If you're building a product right now — how do you decide when a feature request has earned its spot on the roadmap? #BuildInPublic #SaaS #ProductDevelopment
Real output from PostWire's writer on Sept 26, 2026, not edited (23.4 s for six networks; three shown). You review and edit before anything is published.
The 10 networks PostWire publishes to
Every network PostWire's production setup publishes to on Oct 5, 2026, and whether Buffer lists it on its own page (read Sept 26, 2026). "Not listed" means we could not find it there.
| Network | PostWire | Buffer |
|---|---|---|
| TikTok | Live approved Jul 7, 2026 | Yes |
| Live business/creator | Yes | |
| Facebook Pages | Live Pages | Yes |
| YouTube | Live | Yes |
| LinkedIn profile | Live text posts | Yes |
| X | Live paid plans, X credits | Yes |
| Bluesky | Live | Yes |
| Mastodon | Live | Yes |
| Telegram | Live | No |
| Discord | Live | No |
Both price lists
Buffer
| Plan | What's included | Per month |
|---|---|---|
| Free | 3 channels, 10 scheduled posts per channel, 1 API key | $0 |
| Essentials | Per channel | $6 |
| Team | Per channel, unlimited members | $12 |
Monthly prices; billed yearly, $5 and $10 per channel. API limits: Free 3,000 requests per 30 days, Essentials 7,500, Team 15,000. From Buffer's pricing page, Sept 26, 2026.
PostWire
| PostWire plan | Businesses | Posts a month | Per month |
|---|---|---|---|
| Free | 1 | 20 | $0 |
| Starter | 3 | 1,000 | $9 |
| Pro | 10 | Unlimited (fair use 10,000) | $29 |
| Agency | 50 | Unlimited (fair use 50,000) | $99 |
| Scale | 200 | Unlimited (fair use 150,000) | $299 |
Per business — every network connects on every plan; paid plans post to all of them at once. AI writing included. A post counts once per network. Billed monthly, or yearly at 20% off. Full pricing.
- Pricing: buffer.com/pricing
- Developer docs: developers.buffer.com/
- MCP server: developers.buffer.com/guides/integrations/mcp.html
- Refund policy (Oct 5, 2026): support.buffer.com/articles/refund-policy-d1GbglDfJa
Questions people ask
Is PostWire a good Buffer alternative?
Yes, if you want the API to write each network's post and publish them together, billed per business: one request returns every network's draft, one more publishes them, and a signed webhook tells your server how each network went. The free plan includes the API and the MCP server.
Where is PostWire better than Buffer?
Two calls post everywhere. POST /api/generate returns a native draft for every network from one prompt; POST /api/post publishes them all. Buffer's API and MCP server post your own text to one channel per call. All or nothing. Before anything goes out, every network in the request is checked — connection, length, required media — and the request is refused whole if one would fail, instead of publishing to some. Retries are safe with an idempotency_key (24 hours). Per business, not per channel. 10 businesses on 5 networks are $29 a month. Buffer bills $6 per channel on Essentials: $300 for 50. Signed webhooks for each network's result (post.published, post.failed, connection.reauth_required), retried for two days, on every plan, plus a public status page with each network's delivery rate.
How much does Buffer cost compared to PostWire?
Buffer charges per channel (each connected account): $6 on Essentials, $12 on Team, billed monthly; its cheapest paid plan is $6 per channel a month (Essentials; $5 billed yearly) (read on Sept 26, 2026 from https://buffer.com/pricing). PostWire charges per business — every network connects on every plan; paid plans post to all of them at once: Free for 1 business (2 networks per post), $9 for 3, $29 for 10, $99 for 50. For 10 businesses on 5 networks each: $300 on Buffer against $29 on PostWire.
Does PostWire post to X or Reddit?
X: yes, as a pay-per-use add-on of the paid plans (X charges for every post): 1 X credit = 1 X post, 10 for a post with a link, +1 per image or video, with X credits included every month on Starter, Pro, Agency and Scale; not on Free. Reddit: not yet, it is waiting on Reddit's API access approval. Also live: TikTok, Instagram, Facebook Pages, YouTube, LinkedIn (personal profiles), Bluesky, Mastodon, Telegram and Discord.
How many calls does PostWire need to post everywhere?
Two over REST: POST /api/generate returns a native draft per network from one prompt, and POST /api/post publishes them (or POST /api/schedule queues them). The n8n node can do both in one step, and over MCP you ask once and the agent calls generate_posts then post_to_social.
Is there a free plan and a refund?
Yes. The free plan covers 1 business, 20 posts a month and 2 networks per post — every network connects free — with no card and no time limit. Paid plans can be refunded in full within 14 days of the first payment, through the support form.
Type one idea and see the post each network gets.
The demo on the home page writes live, with no account, and never publishes. The free plan covers one business — every network connects free, 2 networks per post — with no card and no time limit. Paid plans have a 14-day refund.