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In LinkedIn lead generation automation, two messaging channels coexist: direct messages (available only with first-degree connections) and InMail (available for contacting profiles outside your network using a Sales Navigator or Premium credit). The choice between the two is not insignificant: their response rates, costs, and use cases are fundamentally different.
1. Direct messaging: the most effective channel, but also the most restrictive
Direct messages in LinkedIn lead generation automation can only be sent to first-degree connections—that is, people who have accepted your connection request. This is the main limitation: you must first establish at least a basic relationship.
This is also its main strength: a message sent to an existing contact fits into an existing relationship. The prospect knows you, at least by name. The open and response rates for a direct message are generally higher than those for a cold InMail, assuming the message and targeting are equivalent.
The standard sequence for automated LinkedIn prospecting to maximize direct messages: send a connection request with a personalized note → wait for the request to be accepted → send an initial message that ties in with the context of the connection request → follow-up sequence.
2. InMail: Contacting People Outside Your Network with a Credit Limit
InMail lets you contact LinkedIn profiles outside your immediate network without first sending a connection request. It is Sales Navigator’s main feature forautomating LinkedIn prospecting on hard-to-reach profiles.
InMail credits are limited (typically 50 per month in Sales Navigator) and are only replenished when the recipient replies. This provides a strong incentive to focus on quality: sending an InMail to an unqualified prospect or with a generic message is a waste of a valuable credit.
The average response rate for LinkedIn InMails is generally lower than the response rate for direct messages with equivalent targeting. The reason: InMails arrive without any prior relationship context. They must therefore make a compelling case in just a few seconds, with an opening line that immediately justifies why the contact is relevant.
3. When to Use InMail vs. Direct Message
Use InMail for: senior decision-makers who are difficult to connect with directly (C-level, VP), profiles that are reluctant to accept invitations from strangers, strategic accounts where you want to reach out directly without going through the invitation phase, and follow-ups with profiles that haven't responded to your connection request.
Use direct messages for: high-volumeLinkedIn lead generation automation, post-connection follow-up sequences, outreach to profiles that have already interacted with your content, and campaigns where the cost in InMail credits would be prohibitive.
4. Optimize Your InMails to Maximize the Response Rate
An effective InMail used for automated LinkedIn prospecting follows a specific structure. It should be short (fewer than 150 words), with a first line that immediately demonstrates why the contact is relevant to the specific recipient.
Personalization is even more critical for InMails than for direct messages, precisely because there is no prior relationship context. An InMail that mentions the prospect’s exact job title, a recent update from their company, or a mutual connection has a significantly higher response rate than a generic InMail.Hyper-personalization in B2B prospecting is applied here with even greater rigor than in other formats.
5. The Complementarity of the Two Channels in a Sequence
The best LinkedIn lead generation automation combines the two channels in sequence: an InMail to break the ice with someone outside your network → a connection request if there’s no response → a direct message after the request is accepted → a follow-up sequence of direct messages.
This multi-step approach takes into account the constraints of both formats, maximizes the chances of making contact, and is part of a cohesive multichannel strategy that can also incorporate email and phone calls depending on the prospect’s level of maturity.
Conclusion
In automated LinkedIn prospecting, the choice between InMail and direct messages depends on the target profile, the stage of the relationship, and the available resources. Both formats have their place in a well-designed strategy. The mistake to avoid is choosing one or the other by default, without tailoring it to the context of each prospect.
