Free Instagram auto-DM tools compared (and what 'free' actually means)
Almost every Instagram auto-DM tool has a free tier. They are not the same thing wearing the same label. One free plan lets you run real comment-to-DM on your posts. Another caps you so low you hit the wall on your first decent reel. A third gives you a generous DM count but quietly leaves out the one feature you came for.
This is a straight comparison of the free plans in the category, what each one gives you, and where the catch sits. No tool here is bad. They just draw the free line in very different places, and that line is what matters when you decide what to test.
What "free" should actually buy you
Before the table, it helps to know what to look for. A free plan for comment-to-DM is only useful if it covers three things at once.
First, the comment-to-DM feature itself. This sounds obvious, but some tools put a generous DM allowance on the free plan and then exclude keyword comment auto-reply from it. You get DMs you cannot trigger the way you wanted.
Second, enough volume to learn something. A keyword reply is a volume mechanic. If the free tier caps you at a handful of contacts or replies, you cannot tell whether the idea works for your audience before you are asked to pay.
Third, no card to start. A free plan that needs a credit card up front is a trial with extra steps. The point of free is to validate the idea with zero commitment.
The free tiers, side by side
Here is how the free plans line up on the things that decide whether they are usable. Numbers are each tool's published free-tier allowance.
| Tool | Free DM / contact allowance | Comment auto-reply on free? | Card to start? |
|---|---|---|---|
| Comment Auto Reply | 1,000 auto-DMs / mo | Yes, included | No |
| ReplyRush | 1,500 DMs / mo | No | No |
| LinkDM | 1,000 DMs / mo | Yes | No |
| CreatorFlow | 500 DMs / mo | Yes | No |
| ManyChat | 25 active contacts / mo | Yes | No |
The headline number on its own is misleading. ReplyRush has the biggest free DM count, but the catch is in the second column, and ManyChat's number looks small because it counts something different. The next section walks each one.
The catch on each free plan
Comment Auto Reply: 1,000 auto-DMs, comment-to-DM included
The free plan is built for the job you came for. You get one Instagram account, comment-to-DM plus story replies, 1,000 auto-DMs a month, 3 keyword triggers, and basic analytics, with no card required. The limits are the trigger count and the DM cap, not the core feature. Comment auto-reply is the thing the free tier exists to let you run, so you can post "comment RECIPE and I'll DM you the link" and watch it actually work before deciding anything.
The honest catch: 3 triggers and 1,000 DMs a month are a validation budget, not a forever-at-scale budget. A reel that pops off can move past 1,000 replies, and that is the point where the paid plans raise the ceiling.
ReplyRush: 1,500 DMs, but not for comments
ReplyRush has the most generous DM allowance on its free plan at 1,500 a month. The catch is the second column of the table: comment auto-reply is not on the free tier. On ReplyRush, comment-to-DM is a paid feature that starts at $10 a month. So the free plan gives you DM volume, but not the keyword-comment trigger most creators want it for. If comment-to-DM is your reason for shopping, the free plan does not test it.
LinkDM: 1,000 DMs, comment-to-DM included, web only
LinkDM's free plan includes 1,000 DMs a month with comment auto-reply, no card to start. It is a real free tier for the core job. LinkDM has been a Meta partner since 2021 and cites 51,000-plus creators, so the trust numbers are strong. The thing to know going in is that LinkDM is web-only. There is no iOS app, so setup and management happen at a desktop, not from your phone between posts.
CreatorFlow: 500 DMs, more tools, lower cap
CreatorFlow's free plan includes comment auto-reply with no card, and the company bundles a large set of free tools, including a DM ROI calculator, plus a 14-day money-back window on paid plans. The catch is the smallest DM cap in this comparison at 500 a month. For a first test that is workable, but 500 replies disappears quickly on a post that travels. Like LinkDM, CreatorFlow is web-only.
ManyChat: 25 active contacts, and the meter underneath
ManyChat's free plan is the one that changed the most. After its March 2, 2026 pricing restructure, the free tier dropped to 25 active contacts a month, down from 1,000 before. An active contact is any person you interact with in a month, and the counter resets monthly. So 25 is not 25 forever. It is 25 per month, which a post that does anything at all burns through in the first hour.
The deeper catch is the model itself. ManyChat bills by active contact, with per-contact overage once you pass your plan's cap, so on paid tiers a viral reel can spike your bill into the thousands in a single month. The free plan is small because it is the entry to a contact-metered system, not a flat one. The ManyChat alternative comparison covers the per-contact math on a 50,000-comment reel.
How to read a free plan before you commit
A few questions cut through the marketing fast.
Is the feature you want on the free tier, or behind it? A big free DM count means nothing if comment auto-reply is a paid add-on. Check the feature list, not just the number.
Is the cap a contact meter or a flat allowance? A contact meter that resets monthly behaves very differently from a flat monthly DM count. With a meter, your best month is your most expensive one, even on plans above free.
Does the cap survive one good post? If a single reel can exhaust the free tier in an afternoon, the free plan is a demo, not a test. You want enough room to see real results across a few posts.
Can you run it from where you work? Several of these are web-only. If you post and manage from your phone, an iOS app is the difference between adjusting a trigger in ten seconds and waiting until you are at a desktop.
The short version
Every tool in this list has a free plan, and most of them are honest about it once you read past the headline number. The differences that matter are whether comment auto-reply is included, how much volume you get, and whether the cap is a flat allowance or a contact meter that resets every month.
For testing comment-to-DM with no card and enough room to learn, Comment Auto Reply gives you 1,000 auto-DMs a month with the feature included, from your phone. To compare the paid tiers on price and limits, the pricing page lays out all three plans, and the ManyChat comparison breaks down why a flat price beats per-contact billing once a post takes off.