"Social media automation" covers several different jobs, and no single tool does all of them well. A post that goes out by itself needs content (the text and link), an image, a scheduler that publishes at the right time on each network, and usually glue that starts the whole thing when something happens — a new blog post, a product in the shop, a review. This page goes through each layer, the tools that do it, and what their plans and APIs offer, with every fact taken from the vendors' own pages on 2026-11-08.
One thing up front: we are only the image layer. We render images from templates; we do not write posts, schedule them or publish them. The rest of this page is about the tools that do.
Layer 1: scheduling and publishing
Schedulers connect your social accounts, keep a queue and calendar, and publish at the planned time. The differences that matter for automation are price, networks and whether software can add posts through an API.
| Tool | Free plan | Cheapest paid plan (as listed) | API for scheduling |
|---|---|---|---|
| Buffer | Yes: 3 channels, 10 scheduled posts per channel | Essentials, $5 a month per channel, billed yearly | Yes, on every plan, Free included |
| Hootsuite | No; 14-day trial | Standard, $99 per user a month, billed annually | Publishing API; developer account must be approved |
| Later | No; 14-day trial | Starter, $18.75 a month, billed yearly | Not found on Later's site |
| Sprout Social | No; 30-day trial | Essentials, $79 per seat a month yearly, $99 monthly | Advanced plan; drafts only |
| Publer | Yes: 3 accounts (not X), 10 scheduled posts each | Professional (price shown only in the browser) | Business and Enterprise plans |
| Metricool | Yes: 1 brand, 20 posts a month (no LinkedIn or X) | Starter, from $20 a month yearly, $25 monthly | Advanced and Custom plans |
Notes from the sources:
- Buffer (pricing, developers) lists Instagram, Facebook, TikTok, LinkedIn, X, YouTube, Threads, Pinterest, Google Business Profile, Bluesky, Mastodon and Substack. Its API includes creating scheduled and draft posts; the Free plan allows "1,000 requests per channel/month".
- Hootsuite (plans): "Paid plans start at $99 for a Standard plan". Its Publishing API "schedule[s] content to post to social media accounts", but the docs say TikTok, YouTube and Bluesky are not supported through it.
- Later (pricing): the Starter plan is "1 social set (8 profiles total)" and "up to 30 posts per profile"; Later lists Instagram, Facebook, TikTok, Threads, YouTube, Pinterest, LinkedIn and Snapchat.
- Sprout Social (pricing): its API documentation says "Only posts created in draft status are supported at this time" — software can prepare posts, a person publishes them.
- Publer (plans): "The Publer API is available exclusively to Business and Enterprise customers"; X accounts need a paid plan "due to the Twitter / X Enterprise API cost".
- Metricool (pricing): "The API is available on Advanced and Custom plans"; X needs an add-on.
Prices change often and some are shown only for yearly billing; check the pricing page before you choose.
Layer 2: glue — Zapier, Make and n8n
Automation platforms watch for events and run steps. For social media they do two things: start the flow (a new RSS item, a new row in a sheet, a new product) and, if you do not use a scheduler, post directly.
- Zapier has a Schedule trigger (every hour, day, week or month) and posting actions such as LinkedIn "Create Share Update" and "Create Company Update", Facebook Pages "Create Page Photo", and Instagram for Business "Publish Photo(s)" — the last one "will only work for an Instagram Business Account".
- Make offers LinkedIn user and company posts, Facebook Page posts and photos, and Instagram for Business photo, reel and carousel posts.
- n8n has a LinkedIn node ("Post: Create"), an X node ("Create or reply a tweet") and a generic Facebook Graph API node for calls you write yourself (n8n docs).
A common pattern: the glue tool notices new content, renders the image, and hands both to the scheduler — which keeps a calendar people can still review — rather than posting directly.
Layer 3: images
Every post needs a picture, and this is where automated flows most often fall back to a manual step. The options:
- Scheduler features: most schedulers import from Canva; Buffer, Later, Publer and Metricool name a Canva integration. Some add AI: Hootsuite says it can "generate social media posts and on-brand images", and Publer's Business plan includes AI images.
- A design tool by hand: fine for a few posts a week, the bottleneck beyond that.
- An image API with templates — our layer. A template is designed once; each post's text, photo and date fill it; the API returns the image in every size the networks want, ready for the scheduler or the glue step. Built-in templates cover blog posts, quotes, product cards, events and announcements (social media images).
The difference between AI images and templates matters for brands: AI produces a new picture each time, a template produces the same approved layout with exactly the text you send — the right tool for a price, a date or a quote.
A complete flow, as an example
- Trigger: a new blog post appears in your RSS feed (Zapier, Make or n8n).
- Image: an HTTP step sends the title and cover photo to our API and gets back the image in each size the post needs (Zapier recipe, Make, n8n).
- Schedule: the next step adds a post to Buffer's queue with the image and the link — or a person picks it up from the scheduler's drafts.
Each layer can be swapped without touching the others: the scheduler does not care where the image came from, and the image does not care where it is posted.
What we do, and do not do
- We render the images — from templates, in every social size, as PNG, JPEG, WebP, one-page PDFs (for LinkedIn document carousels, merged in your code: LinkedIn carousels) or short GIF/MP4 animations.
- We do not write captions, schedule, publish, reply to comments or report analytics; there is no posting to any network from our side.
- We have no native app in Zapier, Make or n8n; the integration is their HTTP step.
The Free plan's 100 renders a month carry a watermark; Starter is $9 a month for 2,000 renders (pricing).
