LinkDM and UnlockDM both send an Instagram DM when someone comments a keyword, and both run on Meta's official API. The difference is what they are built for. LinkDM is a long-running subscription tool: 1,000 free DMs a month, then $19 a month for 25,000 DMs across 3 accounts. UnlockDM charges once per campaign and is built around giveaways and launches.
The decision rule: if you want automation running every day across posts, Stories, and more than one account, LinkDM is the better buy. If you run occasional giveaways where the follow has to be real and you want entrants to bring friends, UnlockDM fits better. This is a researched comparison from LinkDM's own pricing and help pages, checked on 12 October 2026, not a hands-on test.
Billing side by side
| LinkDM | UnlockDM | |
|---|---|---|
| How you pay | Monthly or annual subscription | Once per campaign |
| Free path | 1,000 DMs a month, 1 account, every month | First Spark campaign free, 50 unlocks over 7 days |
| Paid entry | Pro, $19 a month or $182 a year | Spark, Drop, or Viral per campaign |
| Accounts | 3 on Pro, 10 on Platinum+ ($99 a month) | One Instagram account per campaign |
| Channels | Instagram plus Facebook DMs | Instagram only |
| Quiet month | Your plan price if you stay subscribed | Nothing |
LinkDM's free plan is one of the most generous in the category. A Reel that pulls 300 keyword comments uses 300 of the 1,000, so a creator posting a few lead magnets a month may never pay. That is a real advantage, and for steady use UnlockDM will not beat it on price.
UnlockDM is priced by campaign length and capacity instead. Spark runs 7 days with room for 500 unlocks, Drop has no time limit and 2,000 unlocks, and Viral has no cap. Our per-campaign pricing guide works through when paying per launch costs less than a subscription you carry through quiet months.
The follow check is the real difference
Older write-ups, including an earlier version of our own LinkDM review, say LinkDM has no follow gate. That is out of date. LinkDM's help centre documents a Follower Growth Tool inside Flow Automations, a paid-plan feature.
Here is how LinkDM describes it. A person taps the button in your first DM, LinkDM checks whether they follow you, and a non-follower gets a "follow first" message with a button such as "I'm now following!". If they tap it without following, LinkDM checks again. After a set number of retries, which you choose between two and four, the next tap sends the requested DM anyway. LinkDM frames this as a fallback for when it cannot see a person's follower status.
That design choice is reasonable for a link-delivery tool, because nobody gets stuck. It also means the follow is encouraged, not required. Someone determined to skip it gets the link after a few taps.
UnlockDM makes the opposite choice. When a participant taps the confirm button, it checks Meta's is_user_follow_business field and delivers the reward only to verified followers. Meta exposes that field once the person has interacted in the DM, which the button tap provides.
The gap between the two shows up in the numbers. Across 21 follow-gated UnlockDM campaigns between 11 July and 6 October 2026, 2,399 of 5,329 participants (45.0%) completed a verified follow. Without one very large campaign, the rate was 55.1%. Roughly half the people who comment do not end up following. A gate that eventually releases the reward would hand most of them the prize anyway. Our follow gate explainer covers why the check matters for giveaways in particular.
Where LinkDM does more
LinkDM is the broader tool, and it is fair to say where.
- Story mentions, and replies without a keyword. Story auto-reply and Story mention replies are on every plan, Free included. UnlockDM can trigger a campaign from a Story reply, but only one that contains your keyword, and it has no Story-mention trigger. Our Stories-to-DM funnel guide covers when Story replies are worth automating.
- Facebook DMs. LinkDM's plans include Facebook DM automations. UnlockDM is Instagram only.
- Several accounts. Pro covers 3 Instagram accounts and Platinum+ covers 10, which suits agencies and creators with side accounts.
- Always-on tools. Inbox starters, a DM planner, reminder DMs, Live automations, and email capture in chat on Pro.
Where UnlockDM does more
UnlockDM is narrower on purpose. It treats a giveaway or launch as a campaign with a start, a reward, and a result.
- A verified follow before the reward, as above.
- Personal referral links. Every participant gets their own link, and you can set a bonus reward for bringing a set number of friends. LinkDM's "Referral Program" is a different thing: it is LinkDM's own affiliate scheme, paying Pro users 30% of what people they refer to LinkDM spend. It does not give your audience referral links.
- Leaderboard and winner picker on Drop and Viral campaigns, so you can run and close a giveaway inside the same tool. Our guide to running a giveaway with referral links covers how to set the bonus threshold.
Who should pick which
Pick LinkDM if you:
- Want comment-to-DM running all the time, every month
- Will fit inside 1,000 DMs a month on one account, or want 3 accounts for $19
- Need Story-mention replies or Facebook DMs as well as comments
- Want a follow nudge but not a hard requirement
Pick UnlockDM if you:
- Run giveaways, drops, or launches in bursts and want to pay nothing between them
- Need the follow verified before the reward goes out
- Want entrants to bring new people through personal referral links
- Want a leaderboard and winner picker for the same campaign
For LinkDM's full plan breakdown, see our LinkDM review, and the UnlockDM vs LinkDM page for a side-by-side plan view.
Sources checked
Checked on 2026-10-12. Vendors revise pricing pages without notice.
- LinkDM pricing (Free 1,000 DMs a month on 1 account; Pro $19 a month or $182 a year, 25,000 DMs, 3 accounts; Platinum+ $99 a month; Story auto-reply and Facebook DM automations listed on all plans)
- LinkDM help: Follower Growth Tool (follow check inside Flow Automations; the requested DM is sent after the chosen number of retries)
- LinkDM referral program (30% commission for Pro users who refer paying LinkDM customers)
- Meta for Developers: Instagram messaging User Profile API (
is_user_follow_business) - UnlockDM production data: 5,329 participants in 21 follow-gated campaigns, 11 July to 6 October 2026, internal and test accounts excluded
UnlockDM charges once per campaign, verifies the follow before the reward, and gives every participant a referral link. Your first Spark campaign is free.
