Someone asks you a fair question over dinner: how do you actually message a person on LinkedIn? The honest answer takes a few minutes, because the platform has built five different ways in, each with its own gate and its own ceiling. Most articles on the subject treat LinkedIn as one channel and move on.
That shortcut is expensive in both directions. A consultant who believes messaging requires InMail will buy a subscription to reach people a free invitation would have reached. Another, convinced everything is free, will push invitations until LinkedIn starts demanding an email address before each one, which is a restriction and not a form field.
What follows separates the routes and says what LinkedIn puts in writing about each. Every platform fact below is quoted from LinkedIn's help pages and was checked on November 8, 2026. How many messages you may send per day is a different question with a different set of sources, and we answered it in our piece on what LinkedIn publishes about message and invitation limits.
The five ways in, and what each one costs
| The route | Who it reaches | What it costs | What LinkedIn documents |
|---|---|---|---|
| Message | Your first-degree connections, and members of your groups | Nothing | "You can contact them by sending a message on LinkedIn" |
| Invitation | Anyone, in practice second-degree profiles | Nothing in money, a note capped in length and in volume | The Connect button, the note, and the restrictions that follow volume |
| InMail | Members outside your network | A monthly credit attached to a paid plan | Credits per plan, expiry, refund on acceptance, length caps |
| Open Profile message | Premium members who switched the setting on | Nothing, within an unpublished limit | "allows members to contact a Premium member for free" |
| Message request | Coworkers and group members you are not connected to | Nothing, no attachment allowed | "coworkers or Group members that you aren't already connected with" |
Four of those five cost nothing. Paying buys one privilege and no other: writing to a stranger who shares no network with you. Everything above that line LinkedIn gives away, with conditions it states in plain language.
The free route: a message to a first-degree connection
On its page about degrees of connection, LinkedIn defines first-degree connections as "people you're directly connected to because you've accepted their invitation to connect," then spells out what that permits in a single line: "You can contact them by sending a message on LinkedIn." Nothing is spent, and nobody has to approve it.
The same page holds a detail worth more than its placement suggests. Members of your groups are described as "people who are considered part of your network because you're members of the same group," and their contact option reads: "You can contact them by sending a message on LinkedIn or directly through the group." Joining a group where your buyers already gather therefore widens the set of people you can write to for free, which is an odd thing to find buried in a definitions page.
For second-degree profiles, that page offers one move, and it is not a message: "You can send them an invitation by clicking the Connect button on their profile page." For third-degree profiles it describes no contact option at all. Out of network, InMail appears, hedged: "If the option is available."
So the free route is wide and it only opens toward people who have already said yes to you once. The same lopsidedness runs through every channel we sell on, which is why we spent a whole article separating following up from cold outreach.
The invitation: the route you ask someone to open
An invitation costs nothing, which makes it look like the obvious volume play, and that impression is what gets accounts restricted.
The button first, since it trips people up. LinkedIn's page on the ways to connect says to "select Connect on their profile page," and adds that when Connect is not displayed, for instance when Follow is the primary option, you "select More and then select Connect." A missing Connect button usually means it moved rather than that the person is unreachable.
The note attached to the invitation is the real constraint. LinkedIn's page on personalizing invitations gives a cap of "up to 200 characters" and says "you can add a personalized message to up to three connection requests per month," while Premium members are shown with no such cap. Run that against a free account sending invitations every week and most of them go out bare, leaving the recipient nothing to judge but your headline.
The same page carries the fact that decides your next move: "If the recipient replies to your message or accepts your invitation, the conversation appears in your messages." Your note becomes the opening message of the thread, read before the person said yes, so whatever you send afterward arrives as a second message. That is why the reflexive thank-you lands so flat, a point we take apart in what to write once a LinkedIn connection is accepted.
The ceiling on this route is unusual, because it is not numeric. LinkedIn's best practices page for connecting with other members is blunt about what goes wrong: "The most common reason for an invitation restriction is sending too many invitations to people you don't know." Its remedy is equally blunt, and almost no outreach vendor repeats it: "Only invite people that you personally know and who know you." Once the restriction lands, LinkedIn starts requiring the recipient's email address before each invitation. It says it "may lift the restriction automatically," and it warns that after further restrictions "your account may be permanently required to enter the recipient's email address for all future invitations."
That is a price, just not one billed in dollars. Spend it and the cheapest way into anyone's inbox closes behind you, with no subscription available to reopen it.
InMail: what the credit actually buys
InMail is the only route LinkedIn charges for, and its help page on InMail messages is refreshingly specific. The message "allows you to directly message another LinkedIn member that you're not connected to." Credits arrive monthly and vary by subscription, from a handful on the entry plans to a few dozen on Sales Navigator, with the exact figures listed on that page and restated in our round-up of LinkedIn's published limits.
Three mechanics on that same page matter more than the credit count. Credits left on the table "expire after 90 days," so an allowance you fail to use is an allowance you forfeit. You "receive InMail message credit back if a recipient accepts your InMail," which means the cost lands only on the messages nobody wanted. And the format is generous to a fault: "up to 200 characters in the optional subject line and up to 2000 characters in the body."
That last figure is a trap rather than an allowance. Two thousand characters is about a page, arriving unannounced from a name the reader does not recognize. The credit bought placement in an inbox and nothing beyond it.
Two misreadings of InMail cost real money. It adds no reach with your existing connections, who are already free to message, and it confers no welcome: the recipient knows a stranger paid to appear. What the credit covers is one narrow movement, opening a conversation with someone who has given you no signal, and that happens to be the weakest movement available to a coach with two years of unread inbound.
Two routes most people never notice
Both of the remaining ways in reach non-connections without a credit, and both hide in settings pages.
Open Profile is the first. LinkedIn's page on sending an Open Profile message states that the feature "allows members to contact a Premium member for free," and the settings page behind it describes the toggle as letting "anyone on LinkedIn to contact you directly for free, even if they aren't connected with you." There is a brake, and LinkedIn declines to quantify it: "we limit the number of Open Profile messages you can send in a given time period," with the settings page adding that "members with basic or free accounts can only send a limited number of open profile messages each month." A share of the Premium profiles you were about to spend a credit on are therefore reachable at no cost, if they turned the setting on.
The message request is the second. LinkedIn's page on message requests says "you can send a message request to communicate with coworkers or Group members that you aren't already connected with." When the recipient accepts, "the conversation will move to the main inbox." Two constraints come attached: "attachments cannot be sent in message requests," and the platform reserves judgment with the line "we may limit your ability to send messages to members you are not connected to." One detail is easy to misread. Because "if a member declines a message request, the sender won't be notified," silence tells you nothing about whether the person ever opened it.
Which route for which person
Sort the routes by how far the other person has already moved toward you and the choice mostly makes itself.
People who wrote to you, accepted your invitation, or replied in a thread that later went quiet are reachable by plain message. For anyone who has been publishing for a year or more this is the largest group by a wide margin, and the only one you enter with context. A single sentence that names that context does more than any subject line:
You mentioned in June you were waiting on Q4 budget before bringing in a coach. Did that land, and is it still on your list?
People in your groups come next, since LinkedIn counts them as network. A message or a request reaches them, both free, and the group gives you something concrete to refer to.
Second-degree profiles get an invitation, where the note deserves more of your effort than the message that follows it. Two hundred characters about why this person specifically, written at the pace of a few a week, is a different activity from emptying a list.
That leaves InMail with one honest use: a named person, outside your network, Open Profile off, who matters enough to be worth a credit on their own. If your month depends on sending a volume of those, buying more credits will not fix what is wrong.
The conversations already behind the free route
Most of the people worth a message this week need no credit at all, so the difficulty is retrieval rather than permission. LinkedIn sorts its inbox by recency instead of by who spoke last, which means a thread that went quiet in March sits under everything that has arrived since, a structural quirk we dug into in our guide to finding old LinkedIn messages.
Working from your own account, Ficiel reads back through the threads you already have, Instagram, WhatsApp and LinkedIn side by side, and brings forward the ones where a question was asked and never settled. No credit comes into it anywhere, since every name it hands you wrote to you first.
Kord is Ficiel's AI assistant: it rereads your conversations, finds the leads who went quiet, drafts follow-ups in your own voice, and a human always approves before anything is sent. That approval earns its keep on LinkedIn more than anywhere else, because the people here have read a hundred templates and tend to recognize the hundred and first.
Two limits belong in the open. Ficiel keeps no database of profiles and will not open a conversation with someone who has sent you nothing, so the InMail route sits outside it by design. Essentiel covers one account per channel, rereads 24 months of history and allows 15 follow-ups per day per channel, which leaves anything older than that window where it is. Restrictions remain LinkedIn's call as well, and no product can see thresholds the platform has never published.
FAQ
What is Ficiel?
Ficiel is an AI inbox for coaches and setters: it surfaces old Instagram, WhatsApp and LinkedIn conversations worth following up, drafts the message, and nothing is sent without your approval. For LinkedIn specifically, that means the invitations you got accepted and never answered, plus the exchanges that broke off after a question. Every draft reaches you before it reaches anyone else.
Can you message someone on LinkedIn without connecting?
Yes, by three routes. You can InMail them if you hold credits from a paid plan. You can send a free Open Profile message if they are a Premium member who turned that setting on. And you can send a message request to a coworker or to someone in a group you share, which LinkedIn's help page describes as the intended use of the feature.
Do you need InMail to reach someone on LinkedIn?
Only for members outside your network whose Open Profile is off and with whom you share no group. Your connections are free to message, group members are free to message, and second-degree profiles are reachable by invitation at no cost. Plenty of people buy a subscription to send messages they could already have sent.
What is the difference between an InMail and a LinkedIn message?
A message goes to someone already inside your network, costs nothing and has no allowance attached. An InMail goes to someone outside it and consumes a credit from your subscription. LinkedIn's InMail page adds the details that matter: credits expire after 90 days, one comes back when the recipient accepts, and the body runs up to 2000 characters.
Is an Open Profile message really free?
Free of credits, yes. LinkedIn states that the feature "allows members to contact a Premium member for free." It also says it limits how many you can send in a given period without publishing the figure, and the settings page notes that basic accounts get a smaller monthly allowance. It only works toward Premium members who enabled the setting, so you cannot plan a week of outreach around it.
Which route should a coach use first?
The one aimed at people who have already moved toward you: a plain message in a thread that exists. It costs nothing, needs no plan, trips none of the signals behind invitation restrictions, and arrives with context you can use. Start there, keep invitations for second-degree profiles at a pace you could sustain by hand, and treat a credit as something you spend on one named person rather than on a list.
