Postkey vs Post Bridge
Postkey vs Post Bridge: the Post Bridge alternative with DM automation
Postkey is the most agentic DM automation tool. Post Bridge is a low-cost scheduler with a 16-tool MCP server for posts. Postkey schedules too, and its agent also builds comment-to-DM automations and answers your DMs.
The short answer
Postkey is the most agentic DM automation tool: one MCP connection lets your AI assistant build and switch on DM automations, answer the inbox, and schedule posts to 10 networks, across every account on your plan. Post Bridge publishes to 10 networks from flat plans with many accounts, and its MCP server and API are on every plan. We found no DM automation or inbox on its pages. Postkey schedules to 10 networks and turns comments into DMs.
Updated October 27, 2026 (Post Bridge's pages)
What an AI agent can do in each
Postkey is the most agentic DM automation tool: one MCP connection lets your AI assistant build and switch on DM automations, answer the inbox, and schedule posts to 10 networks, across every account on your plan. Here is the same list for Post Bridge, from its own pages on October 27, 2026.
| Post Bridge | Postkey | |
|---|---|---|
| MCP server | Yes, 16 tools | Yes, up to 52 tools |
| Builds and switches on DM automations | No: we found no DM automation (searched October 27, 2026) | Yes, and switching on waits for your yes |
| Reads and answers the DM inbox | Not listed | Yes, each reply waits for your yes by default |
| Schedules and publishes posts | Yes, to X, Instagram, LinkedIn, Facebook, TikTok, YouTube, Bluesky, Threads, Pinterest and Google Business | Yes, to Instagram, TikTok, Facebook, Telegram, LinkedIn, YouTube, Threads, Pinterest, Bluesky and Google Business |
| Accounts one connection reaches | Every connected account | Every account on your plan, up to 15 |
| Plans that include it | Every plan | Every plan, inside the plan's limits |
| Sign-in | OAuth, or an API key | OAuth 2.1 with PKCE, or an agent key |
| In the official MCP Registry | Yes | Not yet |
"Not listed" and "None found" mean we could not find it on Post Bridge's own pages on October 27, 2026, not a statement by Post Bridge.
Sources: Post Bridge MCP setup docs
Why Postkey is the most agentic DM automation tool
Postkey's MCP server can build, edit and switch on automations. An agent can do the whole job:
- Build, edit and switch on DM automations: comment to DM, keyword DMs, follow to unlock, collecting emails.
- Read the inbox, draft replies and send them once you say yes.
- Write, schedule and publish posts, and set the DM keyword each post's comments reply to.
- Find and tag contacts, and report how posts and automations did.
- Up to 52 tools in one MCP server, with OAuth sign-in or an agent key, and a skill file that teaches the agent the rules.
- Approvals, limits and protection from instructions hidden in DMs built in, so you can let an agent run it.
Side by side
| Post Bridge | Postkey | |
|---|---|---|
| Comment to DM and keyword DMs | Not listed | Yes |
| Follow to unlock | Not listed | Yes |
| Collect emails in the DM | Not listed | Yes |
| Shared inbox | Not listed | Yes |
| AI replies | Not listed | From Create |
| DM channels | None found (searched October 27, 2026) | Instagram and Messenger |
| Post scheduler | X, Instagram, LinkedIn, Facebook, TikTok, YouTube, Bluesky, Threads, Pinterest and Google Business | Instagram, TikTok, Facebook, Telegram, LinkedIn, YouTube, Threads, Pinterest, Bluesky and Google Business |
| Instagram accounts | "Marketer includes 15 connected accounts. Operator starts at 99 accounts and adds $1 per account after that, with no maximum." | Up to 15 on one plan, sharing one contact allowance |
| How usage is billed | A flat monthly price by connected accounts, with unlimited posts; on Operator each account past 99 costs a little more a month. | Plans include contacts each month, shared by all the plan's accounts; extra contacts are charged, never cut off |
Post Bridge has a 7-day free trial on both plans and no free plan on its pricing page; yearly billing is "2 months free". We found no DM automation and no inbox on its pages.
Sources: post-bridge.com/pricing, post-bridge.com, Post Bridge MCP, Post Bridge MCP setup docs, Post Bridge for AI agents, Post Bridge vs Hootsuite (its own page)
What Postkey does after the post goes out
- Comment to DM: everyone who comments your keyword gets the link by DM, with a public reply.
- Follow to unlock and email capture inside the DM.
- A shared inbox for Instagram and Messenger DMs, with AI replies from Create.
- The post and its keyword are scheduled together, so the DMs start when the post goes live.
What each costs
Post Bridge's list prices in US dollars, as its pricing page showed them on October 27, 2026, then Postkey's in US dollars. Monthly billing unless it says yearly.
| Plan | A month | Billed yearly | Accounts | Limit |
|---|---|---|---|---|
| Post Bridge Marketer | $39 | $390 a year | 15 | 15 connected social accounts, unlimited posts |
| Post Bridge Operator | $99 | $990 a year | 99 | 99 accounts included, then a small fee per account a month, with no maximum |
| Postkey Free | $0 | Free | 2 | 25 contacts a month |
| Postkey Essential | $15 | $144 a year | 2 | 250 contacts a month |
| Postkey Create | $34 | $300 a year | 5 | 2,500 contacts a month, Postkey AI |
| Postkey Pro | $85 | $708 a year | 10 | 7,500 contacts a month, Postkey AI |
| Postkey Advanced | $175 | $1428 a year | 15 | 25,000 contacts a month, Postkey AI |
List prices before tax. Plans change; check each pricing page before you buy.
Sources: post-bridge.com/pricing
Where Post Bridge is a good fit
- A low price per account: 15 accounts on Marketer, 99 on Operator with no ceiling.
- Publishes to 10 networks, Google Business among them, with captions per network and bulk video scheduling.
- A 16-tool MCP server in the official MCP Registry, a REST API on every plan, and a CLI.
- Support from the founder himself.
Where Postkey is the better fit
- You want comments on your posts to turn into DMs with your link, automatically.
- You want one inbox for Instagram and Messenger DMs, with AI replies.
- You want your AI assistant to build DM automations and answer DMs, not only post.
- You want a Free plan to start.
Switching from Post Bridge
- 01
Connect your accounts to Postkey with each network's own sign-in.
- 02
Move your scheduled posts: ask your assistant to recreate them in Postkey, or add them to your posting schedule yourself.
- 03
Add a comment keyword and a link to the posts that should send a DM, and switch on the automation with the post.
Questions
We found none on Post Bridge's pages (searched October 27, 2026), and its own comparison page lists no inbox. Its API covers posts, media, accounts and analytics.
Yes, 16 tools on every plan, listed in the official MCP Registry. They create, edit and schedule posts, upload media and read analytics.
For scheduling many accounts, often yes: its plans include 15 or 99 accounts at a flat price. Postkey adds DM automation, a DM inbox and AI replies, and has a Free plan.
Yes. Postkey's Free plan has 25 contacts a month and 5 scheduled posts a week, and paid plans start with a free trial.