Postkey vs LinkDM
Postkey vs LinkDM
Postkey is the most agentic DM automation tool. Both automate Instagram and Facebook comments and DMs. Postkey adds an MCP server for AI assistants and its own post scheduler.
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. LinkDM is a simple, low-cost comment-to-DM tool for Instagram and Facebook. We found no LinkDM MCP server and no scheduler: it links DMs to posts you publish elsewhere. Postkey's assistant builds the automation and schedules the post in the same conversation, to 10 networks.
Updated October 20, 2026 (LinkDM'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 LinkDM, from its own pages on October 20, 2026.
We found no LinkDM MCP server or AI connector. We checked linkdm.com, its help center and llms.txt, and the official MCP Registry.
| LinkDM | Postkey | |
|---|---|---|
| MCP server | None found (searched October 20, 2026) | Yes, up to 45 tools |
| Builds and switches on DM automations | None found (searched October 20, 2026) | Yes, and switching on waits for your yes |
| Reads and answers the DM inbox | None found (searched October 20, 2026) | Yes, each reply waits for your yes by default |
| Schedules and publishes posts | None found (searched October 20, 2026) | Yes, to Instagram, TikTok, Facebook, Telegram, LinkedIn, YouTube, Threads, Pinterest, Bluesky and Google Business |
| Accounts one connection reaches | None found (searched October 20, 2026) | Every account on your plan, up to 15 |
| Plans that include it | None found (searched October 20, 2026) | Every plan, inside the plan's limits |
| Sign-in | None found (searched October 20, 2026) | OAuth 2.1 with PKCE, or an agent key |
| In the official MCP Registry | None found (searched October 20, 2026) | Not yet |
"Not listed" and "None found" mean we could not find it on LinkDM's own pages on October 20, 2026, not a statement by LinkDM.
Why Postkey is the most agentic DM automation tool
Postkey was built for AI agents from the start, not given an API afterwards. An agent can do the whole job, not only press a button you set up by hand:
- 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 45 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
| LinkDM | Postkey | |
|---|---|---|
| Comment to DM and keyword DMs | Yes | Yes |
| Follow to unlock | Yes (On Pro) | Yes |
| Collect emails in the DM | Yes (On Pro) | Yes |
| Shared inbox | Not listed | Yes |
| AI replies | Not listed | From Create |
| DM channels | Instagram and Messenger | Instagram and Messenger |
| Post scheduler | Not listed | Instagram, TikTok, Facebook, Telegram, LinkedIn, YouTube, Threads, Pinterest, Bluesky and Google Business |
| Instagram accounts | "Connect up to 10 Instagram accounts to your LinkDM profile." | Up to 15 on one plan, sharing one contact allowance |
| How usage is billed | Plans limit DMs sent a month; extra DM credits never expire. | Plans include contacts each month, shared by all the plan's accounts; extra contacts are charged, never cut off |
LinkDM links DMs to posts you publish elsewhere ("Later, Buffer, Meta Suite, etc.").
Sources: linkdm.com/pricing, LinkDM help: DM Planner, linkdm.com
What each costs
LinkDM's list prices in US dollars, as its pricing page showed them on October 20, 2026, then Postkey's in US dollars. Monthly billing unless it says yearly.
| Plan | A month | Billed yearly | Instagram accounts | Limit |
|---|---|---|---|---|
| LinkDM Free | $0 | $0 a year | 1 | 1,000 DMs a month |
| LinkDM Pro | $19 | $182 a year | 3 | 25,000 DMs a month |
| LinkDM Platinum+ | $99 | $832 a year | 10 | 300,000 DMs a month |
| 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: linkdm.com/pricing
Where LinkDM is a good fit
- A generous free plan and a low price for 3 accounts.
- Safety tools for posts that go viral: a DM queue, Slow Down Mode and sending to past comments.
- DM credits that never expire.
Where Postkey is the better fit
- You want ChatGPT, Claude or your own agent to set up automations and answer DMs for you.
- You want the post and its DM keyword scheduled together, in one tool.
- You want a shared inbox and AI replies.
Switching from LinkDM
- 01
Connect your Instagram account to Postkey with Meta's sign-in.
- 02
Ask your assistant to rebuild your keywords and links as Postkey automations, or paste them in yourself.
- 03
Check the DM on the phone preview, then switch it on. Turn the LinkDM version off so people do not get two DMs.
Questions
We found none (searched October 20, 2026): not on linkdm.com, its help center or llms.txt, and not in the official MCP Registry.
We found no scheduler on LinkDM's pages. Its DM Planner links DMs to posts you publish yourself or with another scheduling tool.
LinkDM's Pro plan lists a low price for 3 accounts. Postkey costs more for some setups and adds an MCP server, a post scheduler, a shared inbox and AI replies.
Yes. Postkey's Free plan has 25 contacts a month and 5 scheduled posts a week, and paid plans start with a free trial.