An AI appointment setter for LinkedIn, right inside the DM thread.
An AI appointment setter for LinkedIn answers replies to your LinkedIn outreach and books the meeting. Underfive connects to HeyReach, Expandi, Aimfox and GetSales.io, replies in the same DM thread from the same profile in under 5 minutes, proposes real times from your calendar and sends the invite.
50 free credits · no credit card · updated October 2026
LinkedIn replies are short and conversational, and they arrive across many sender profiles. Leaving them for a daily check means the conversation is cold by the time anyone answers.
How does it work?
- 1
Connect your LinkedIn tool
HeyReach, Expandi, Aimfox or GetSales.io. Replies from every sender profile land in one inbox.
- 2
Answers in the DM
Short, conversational replies in the same thread, from the same profile.
- 3
Meeting on the calendar
Real times offered, the invite sent once the prospect picks one.
How does it compare?
| Underfive | Checking each profile | Booking link in DM | |
|---|---|---|---|
| Response time | Under 5 minutes | Once or twice a day | Instant, but impersonal |
| Many sender profiles | One inbox for all | Log in to each | Same link everywhere |
| Answers questions | Yes | Yes | No |
| Books the meeting | Yes | Manually | If they click |
| Email and LinkedIn together | Yes | No | No |
What you get with Underfive
Four LinkedIn tools
HeyReach, Expandi, Aimfox and GetSales.io.
Conversational by default
Replies match the tone and length of a LinkedIn DM.
Email + LinkedIn in one place
Multichannel campaigns land in the same Unified Inbox.
Approvals in Slack
Review LinkedIn drafts in Slack before they are sent, if you want.
Learn more HeyReach →Expandi →Aimfox →
Frequently asked questions
Which LinkedIn tools does it support?
HeyReach, Expandi, Aimfox and GetSales.io. Lemlist multichannel campaigns are supported too.
Does it reply from the same LinkedIn profile?
Yes. Each answer goes out in the same DM thread from the profile the prospect replied to.
Can it handle many sender profiles?
Yes. Replies from every connected sender land in one inbox, with no cap on senders.
Does LinkedIn cost more credits than email?
No. LinkedIn and email replies use credits the same way.
Can I review LinkedIn replies first?
Yes. Any category can require approval in the app or in Slack before it is sent.