Postiz vs Buffer: Which Social Media MCP Tool is Better?
Postiz vs Buffer compared on API rate limits, MCP servers, and the per-channel math. Both ship MCP, and Buffer's API is free, which most comparisons miss.
Postiz vs Buffer is usually framed as scrappy open source against polished SaaS, and that framing is not wrong so much as it is aimed at the wrong reader. If you are picking a tool for a person to click around in, it holds up. If you are picking one for an agent to call, it tells you almost nothing useful.
Here is what actually surprised me. Buffer ships an MCP server at mcp.buffer.com/mcp, publishes setup guides for ten clients including Claude, ChatGPT, Cursor and Perplexity, and includes API access on its free plan. Google’s AI answer for this exact comparison does not mention any of that, because it is sourced almost entirely from Postiz’s own comparison page.
So the honest version of this comparison is not open versus closed. It is a per-channel meter against a flat tier, one rate limit shape against another, and one tool that generates images and video against one whose AI stops at text. I run a competing product and will disclose it properly further down.
Postiz vs Buffer: At a Glance
Go with Postiz when you want the source, you need reach past the mainstream networks into Discord, Telegram, Reddit, Farcaster or blog targets, or you want AI image and video generation in the same tool that publishes.
Go with Buffer when you want something that has run reliably since 2010, you are on a handful of channels, or you want to test an API integration without paying anything at all. Its free tier is genuinely free, not a trial.
Both assume you are the one wiring it up. If you would rather one key covered publishing, comments and analytics together, see what a managed plan includes, with the honest caveats later on.
Are Postiz and Buffer Even Solving the Same Problem?
Partly. They overlap on scheduling and diverge on almost everything around it.
Buffer is a publishing product with fifteen years of polish on it. Scheduling, a calendar, a link-in-bio page, a comment inbox, analytics. It is opinionated, it is easy, and its AI helps you write rather than trying to produce the visuals for you. Buffer’s own transparency dashboard puts it at roughly 79,000 customers and $25.9M ARR, which is a level of durability none of the newer tools here can claim.
Postiz is a younger open-source project with an agentic bent. AGPL-3.0, past 34,000 GitHub stars, self-hostable via Docker or available as a hosted plan. It schedules, but it also writes, generates images and video, and ships a CLI. The pitch is breadth and ownership rather than polish.
The real split is what happens when the tool is not enough. With Buffer you wait for Buffer. With Postiz you can read the code, patch it, and run your fork, as long as you honor the AGPL.
Who Buffer Is Built For
Buffer is built for creators, solo operators and small teams who want scheduling to be a solved problem. Started in 2010, it has outlasted most of its competitors, and the product reflects that: it is calm, fast, and hard to get wrong.
Pricing is per channel, and this is where nearly every comparison of Buffer gets it wrong, including the ones ranking today. Buffer’s pricing page defaults to the yearly toggle and shows $5 and $10. Those are annual rates. Paying monthly, Essentials is $6 per channel and Team is $12 per channel. If you quote $5 without the asterisk, you understate the monthly bill by about 17 percent.
The per-channel rate does bend at volume, which is worth knowing before you assume per-channel always loses. Buffer’s machine-readable rate card lists Essentials at $6 per channel for 1 to 10, $4 for 11 to 25, $3 for 26 to 50, and $1 for 51 and up. Those bands are marginal, so the cheaper rate applies only to the channels inside it, and your average cost per channel falls without the whole bill repricing. Note the oddity in their own table: in the 11-to-50 range Essentials and Team charge the identical per-channel rate, so the Team upgrade there buys you unlimited seats at no extra per-channel cost.
The free plan is real: 3 channels, 10 scheduled posts per channel, one user, and the AI Assistant included. Buffer supports 11 networks: Bluesky, Facebook, Google Business Profile, Instagram, LinkedIn, Mastodon, Pinterest, Threads, TikTok, X and YouTube. That is the number the AI Overview quotes and, unusually, gets right. Worth noting Mastodon is on that list, because a lot of open-source comparisons treat it as a self-hosted-only destination. Buffer also publishes something most vendors do not, a machine-readable pricing file at buffer.com/pricing.md aimed explicitly at AI agents. That is a small thing that tells you how they are thinking.
Where Buffer is thin is creation. The AI Assistant writes and repurposes text, and that is the whole of it. No image generation, no video. Seats are also the sharp edge: Free and Essentials are one user, so a second person means jumping to Team and doubling the per-channel rate under 10 channels.
Who Postiz Is Built For
Postiz is built for people who would rather own the thing than rent it. Self-host under AGPL-3.0 and every feature is included at no cost: all platforms, API, webhooks, MCP, AI copilot, analytics. Nothing is edition-gated.
Hosted plans run $29 a month for 5 channels, $39 for 10, $49 for 30 and $99 for 100, with a 7-day trial and no permanent free tier on the hosted side.
Reach is the headline. Postiz’s provider docs list 21 platforms with an in-app connect flow plus 10 more reachable through the API only, so the “30+” figure holds. Read the contents before you weigh it, though: WordPress, Medium, Dev.to and Hashnode are blogs, Listmonk is a newsletter tool, and Skool and Whop are communities. As conventional social networks the count is much closer to Buffer’s 11 than the raw totals suggest. What Postiz genuinely reaches that Buffer does not is Discord, Telegram, Slack, Reddit, Farcaster and Nostr.
Postiz also generates. Text via the AI copilot, images metered at 0, 100, 300 and 500 a month by tier, and video at 3, 10, 30 and 60. Worth catching that the $29 Standard tier includes zero AI images, which is easy to miss on a feature list that otherwise looks identical across tiers.
Self-hosting is the cost. Postgres, Redis, and since v2.12.0, Temporal. Official system requirements list 2 vCPU and 2 GB RAM as the supported floor for the all-in-one Docker install, 4 GB or more once you add users, and 4 vCPU with 8 GB as the recommended spec. The out-of-memory warning that circulates about Postiz applies to building from source, not to running the official image, and it has a documented one-line fix.
Postiz vs Buffer: Side by Side
| Category | Postiz | Buffer |
|---|---|---|
| Model | AGPL-3.0 open source, self-host or cloud | Hosted SaaS, closed |
| Pricing | Flat per tier | Per channel, volume ladder |
| Entry cost | $0 self-hosted, or $29/mo cloud | Free for 3 channels |
| Free tier | Self-hosting only (7-day cloud trial) | Yes, permanent, 3 channels |
| Monthly paid rate | $29 for 5 channels | $6/channel (Essentials), $12 (Team) |
| Platforms | 21 with connect UI, 31 including API-only | 11 |
| AI text | Yes | Yes (all tiers, including free) |
| AI images | Yes, metered (0 on the $29 tier) | No |
| AI video | Yes, metered | No |
| Public API | All hosted tiers, plus free when self-hosted | All tiers, including free |
| API shape | REST | GraphQL |
| MCP server | Yes, 9 tools, self-hostable | Yes, hosted at mcp.buffer.com/mcp |
| MCP on the free tier | Yes, when self-hosted | Yes, on the free plan |
| Comment replies via MCP | No, per Postiz docs | Not in its documented MCP tools |
| Comment inbox | Post comments | Yes, all tiers |
| Link-in-bio | No | Yes (Start Page), all tiers |
| Seats | Unlimited on Team and up | 1 user until the Team plan |
| Founded | Repo created 2023 | 2010 |
Two rows do most of the work. Buffer gives you an API and MCP on a free plan, which almost nobody writes about. Postiz gives you generation and reach, which Buffer does not sell at any price.
Where Buffer Wins
A free tier that includes the API. Three channels, one API key, 3,000 requests a month against a 100-request fifteen-minute ceiling, and MCP access, for nothing. For prototyping an agent integration this is the cheapest honest starting point in the category.
It ships MCP. mcp.buffer.com/mcp with Bearer auth. Buffer’s developer home says it works with Claude, ChatGPT, Cursor, Raycast and Perplexity today, and its integrations directory carries setup guides for those plus Antigravity, Manus, n8n, Zapier and Notion. Anyone telling you Buffer is the non-technical option has not read their developer docs lately.
Fifteen years of not falling over. Buffer has been publishing since 2010 and reports roughly 79,000 customers. For anything you intend to run unattended, that track record is a real feature.
Cheapest at the low end, and free at three channels. At 3 channels Buffer costs nothing against Postiz cloud’s $29, and even paid Essentials at 3 channels is $18. Below five channels nothing in this comparison beats it.
Comment inbox and link-in-bio on every tier. Postiz has no link-in-bio page, and its comment support is thinner.
Where Postiz Wins
You can own it. AGPL-3.0, 34,000 stars on GitHub, active maintenance. If vendor risk is something you actually model rather than something you say, this is the only option here that removes it.
It makes content. Text, images and video, metered but present. Buffer’s AI is text only, so anything visual is a second tool and a second bill.
Reach past the mainstream. Discord, Telegram, Slack, Reddit and Farcaster all have a connect flow, and Nostr, WordPress, Medium and Dev.to are reachable through the API. Buffer covers the 11 networks most people use and stops there.
Flat pricing once channels add up. At 10 channels Postiz cloud is $39 against Buffer Essentials at $60 a month. Under 10 channels, per-channel billing is the punishing shape.
Unlimited seats below the top tier. Postiz includes unlimited team members from its $39 plan. Buffer keeps you at one user until Team.
The Real Pricing Math
Per channel versus flat, at monthly rates, using Buffer’s own published ladder.
| Channels | Buffer Essentials | Buffer Team | Postiz cloud |
|---|---|---|---|
| 3 | Free (or $18) | $36 | $29 (Standard) |
| 5 | $30 | $60 | $29 (Standard) |
| 10 | $60 | $120 | $39 (Team) |
| 25 | $120 | $180 | $49 (Pro) |
| 50 | $195 | $255 | $99 (Ultimate) |
| 100 | $245 | $355 | $99 (Ultimate) |
One detail worth getting right, because most write-ups get it wrong. Buffer’s rate card is marginal, not flat. The $1 rate at 51-plus channels applies only to the channels above 50, not retroactively to all of them. So 100 channels is $245 on Essentials, not $100. Buffer publishes its own worked examples up to 50 channels and every row above matches them. The 100-channel figures are calculated from the same published bands.
Buffer wins at 3 channels outright, because free beats $29. At 5 channels it is effectively a tie, $30 against $29, so pick on features rather than price. From about 10 channels upward Postiz pulls ahead and never gives the lead back: $21 cheaper at 10, $71 at 25, and $146 at 100. Self-hosted Postiz is $0 in license at every row, plus your server and your hours.
Three honest caveats. If you run 3 channels and only need scheduling, Buffer’s free plan is the correct answer and nothing here beats it. If you need a link-in-bio page or a real comment inbox, Postiz will not replace Buffer. And if a second teammate is the reason you are shopping, Buffer’s Team plan at 1 to 10 channels is expensive enough that the flat tiers look better fast.
Where Blotato Fits, and Where It Does Not
Disclosure: I built Blotato, so weigh this against the two sections above rather than in place of them.
Blotato is $29 a month flat for 20 social accounts, publishes to 9 platforms, and runs a hosted MCP server at mcp.blotato.com/mcp covering publishing, scheduling, comments, messaging and analytics behind one key. Generation is included rather than metered separately.
Against Buffer, the honest read is that Buffer is cheaper below about five channels and free at three, and it has a track record we do not. Buffer also ships a link-in-bio page and a comment inbox on every tier. Our comments and DMs cover Instagram and Facebook only, and our analytics covers 5 platforms, not all 9.
Against Postiz, the trade is ownership versus operations. Postiz self-hosted is free forever and reaches far more destinations than we do. We are $29 a month with no server for you to patch. If you want the source, take the source.
One caveat for anyone here for the API specifically: our 7-day trial excludes API access, and generating a key ends the trial and starts the Starter subscription. Plan on subscribing rather than trialing. The plan details list what is included.
Use Buffer If
- You run 5 or fewer channels, where Buffer is free or within a dollar of Postiz.
- You want to prototype an agent integration without paying.
- You need a link-in-bio page or a comment inbox.
- You want a tool with a fifteen-year track record.
- Scheduling is the whole job and creation happens elsewhere.
Use Postiz If
- You want the source code and the option to self-host.
- You run 10 or more channels and per-channel billing is adding up.
- You need Discord, Telegram, Reddit, Farcaster or blog targets.
- You want AI image and video generation in the publishing tool.
- You need unlimited seats without the top tier.
Sabrina’s Final Take
If you came here asking which is the better MCP tool, the honest answer is that neither wins on MCP itself. Both ship a real server, both authenticate with a bearer token, and both work with Claude. Buffer’s is hosted and reachable on a free plan, so it is the faster one to try. Postiz’s exposes 9 documented tools (integrationList, groupList, integrationSchema, triggerTool, schedulePostTool, generateImageTool, generateVideoOptions, videoFunctionTool and generateVideoTool) and runs from your own domain when self-hosted, so it is the one you can extend. Pick on what the MCP server is attached to, not on the server, because the open-versus-closed framing that dominates this comparison is mostly a distraction. What actually separates them is channel count and whether you need the tool to create anything.
My honest advice: at 3 channels, start on Buffer’s free plan, because you will not beat free. At 5 channels the two are within a dollar of each other, so decide on features. From 10 channels up, or if you need images and video from the same tool, Postiz has the better economics and the gap only grows. If you want the source, self-host it and treat the server as the price. And if you get a few months in and realize the maintenance was the actual purchase, that is when a managed option is worth pricing out.
If MCP is the actual reason you are here, we ranked every social media MCP server worth connecting, including both of these. For adjacent comparisons, we put Postiz against Mixpost on licensing, Postiz against Zernio on agent workloads, and ran the full field in our Buffer alternatives and Postiz alternatives roundups.
Postiz vs Buffer FAQs
Is Postiz cheaper than Buffer?
It depends entirely on channel count. At 3 channels Buffer is free and Postiz cloud is $29. At 5 channels it is a wash, $30 against $29. From 10 channels upward Postiz is cheaper and the gap only widens: $60 against $39 at 10, $120 against $49 at 25, and $245 against $99 at 100. Buffer’s rate card is marginal, so the $1 band above 50 channels lowers your average cost without repricing the earlier ones. Self-hosted Postiz is free software at every count.
Does Buffer have an MCP server?
Yes. Buffer runs one at mcp.buffer.com/mcp with Bearer-token auth, and its integrations directory publishes setup guides for Claude, ChatGPT, Cursor, Raycast, Perplexity, Antigravity, Manus, n8n, Zapier and Notion. This gets left out of most Postiz comparisons, including Google’s AI answer for this query. Postiz ships one too, exposing 9 tools, and self-hosted instances serve it from their own domain.
Is Buffer’s API free?
Yes, on every tier including the free plan. Free gives you 1 API key and 3,000 requests a month, Essentials 3 keys and 7,500, and Team 5 keys and 15,000. Buffer meters three windows, and only the monthly one appears on the pricing page: the developer docs add a 15-minute ceiling of 100 requests on every plan and a 24-hour ceiling of 250 on Free and Essentials, 500 on Team. It is GraphQL rather than REST, so budget for that if your client assumes REST.
Does Buffer generate images or video?
No. Buffer’s AI Assistant writes and repurposes text, adjusts tone and length, and tailors posts per platform, but it does not generate images or video. Postiz generates both, metered by tier, though its $29 Standard plan includes zero AI images and only three videos a month.
Which supports more social platforms?
Postiz, though by less than it appears. Its docs list 21 platforms with a connect flow plus 10 API-only, while Buffer supports 11. Several Postiz targets are blogs, newsletters or communities rather than social networks. The genuine additions over Buffer are Discord, Telegram, Slack, Reddit, Farcaster and Nostr.
Can Buffer be self-hosted?
No. Buffer is closed hosted software with no self-hosting option. Postiz is the self-hostable one here under AGPL-3.0, which also means that if you modify it and offer it as a service over a network, you owe your users the modified source. For internal use that obligation does not apply.