LinkedIn gives you two ways to reach someone outside your network: a connection request with an optional note, or an InMail message sent directly to their inbox without connecting first. Choosing the wrong one for a given situation wastes credits, lowers reply rates, and can burn the prospect before you have a chance to start a conversation. This guide tells you when to use each, and how most high-performing outreach programmes combine both.
What Is the Actual Difference?
A connection request asks the recipient to join your network. It can include a note of up to 300 characters. If they accept, you can then message them freely. If they ignore or decline, you cannot send them another request for up to three weeks, and repeated ignored requests from the same account can reduce your sending ability over time.
An InMail is a direct message to anyone on LinkedIn, regardless of connection status, using a credit from your monthly allocation. The recipient gets it in their main inbox. InMails do not expire in the same way as connection requests, and a free reply (an InMail you send that gets a reply within 90 days) is returned as a credit, giving you a cost incentive to write for replies rather than just sending volume.
Cost Comparison
| Method | Cost | Monthly volume |
|---|---|---|
| Connection request (free account) | Free | Dynamic, ~100/week for established accounts |
| Connection request (Sales Navigator Core) | ~$99/mo | Same dynamic limit; no InMail credits included |
| InMail (Sales Navigator Core) | Part of ~$99/mo subscription | 50 credits/mo, roll over up to 150 |
| InMail (Premium Business) | Part of ~$60/mo subscription | 15 credits/mo |
| InMail (Career) | Part of ~$40/mo subscription | 5 credits/mo |
At 50 InMail credits per month on Sales Navigator, each credit represents $2 of cost. If your InMail reply rate is 10% (a reasonable estimate for targeted, personalised InMails to the right audience), you are spending $20 per reply. Compare that to connection requests, which at 30% acceptance and 15% reply-on-acceptance produce a similar reply cost at zero incremental expense.
When to Use a Connection Request
Connection requests work best when:
- You have a specific, personalised note to include that references a trigger (their content, a mutual connection, a shared event)
- You want to build a long-term network, not just a one-time outreach
- Your profile is strong enough that seeing it makes accepting worthwhile for the prospect
- You are operating at scale (50 to 100 per week) where InMail credits would run out quickly
- The prospect is in a tier or industry where InMail is overused and likely ignored
A connection request that gets accepted also opens the door to an unlimited message thread, whereas InMail is one message at a time unless a conversation starts. For a campaign where the goal is an ongoing dialogue rather than a single ask, the connection-first approach has a structural advantage.
When to Use InMail
InMail works better when:
- You are targeting very senior people (VP and above) whose connection queues are long and who rarely accept from unknown senders
- The prospect has an "Open Profile" setting enabled (meaning InMail is free to send to them, a key indicator they are receptive to outreach)
- You have a highly specific, high-value message tailored to one person where getting it in front of them immediately is worth a credit
- You want to avoid the "pending invite" queue and reach someone now, before your connection request would be seen
InMail also allows longer messages than a connection request note, which gives you space to establish context more fully for a senior or hard-to-reach target.
Open Profile: The InMail Hack Most People Miss
LinkedIn Premium users can enable "Open Profile," which allows anyone to send them a free InMail regardless of connection status. Before using an InMail credit on a target, check their profile for the "Open" badge. If it is present, you can send a free InMail, essentially getting the direct-to-inbox benefit of InMail with no credit cost.
In highly active communities (founders, VCs, sales professionals), a meaningful share of target profiles have Open Profile enabled. Building the habit of checking before spending a credit can stretch your monthly allocation significantly.
The Hybrid Approach: What High-Performing Teams Actually Do
Most successful B2B outreach programmes on LinkedIn use a tiered approach:
- Tier 1 (volume, mid-market): Connection request with personalised note. Follow up with message sequence on acceptance. This handles the bulk of outreach efficiently.
- Tier 2 (senior targets, enterprise accounts): InMail first with a more substantial message that establishes credibility quickly, then a follow-up connection request if no reply after 7 to 10 days.
- Tier 3 (ultra-high-value accounts): InMail, combined with email outreach and a personalised LinkedIn engagement sequence (commenting on their posts before reaching out). Multi-touch before the ask.
This tiering preserves InMail credits for where they have the highest marginal return and keeps the cost-per-reply efficient across the board. For how to structure the follow-up sequence after a connection request accepts, see the LinkedIn message sequence templates guide.
Reply Rate Benchmarks
Published InMail reply rate benchmarks from LinkedIn suggest averages around 10 to 25% for well-targeted, personalised InMails, though industry estimates vary widely. Connection request acceptance rates for well-targeted lists with personalised notes run 25 to 45%. The meaningful comparison is cost-per-reply, not raw reply rate, since connection requests carry zero direct cost. Use the LinkedIn safe-rate calculator to model your specific scenario.
Is InMail or a connection request more effective for B2B outreach?
For most B2B outreach at scale, connection requests with personalised notes deliver a lower cost-per-reply because they are free and acceptance rates of 25 to 45% are achievable with good targeting and note quality. InMail delivers better results for senior targets and high-value accounts where direct inbox access justifies the credit cost.
What is a good InMail reply rate?
Industry estimates suggest 10 to 25% for targeted, personalised InMails to the right audience. InMails to open profiles (free InMails) tend to perform at the lower end because they are more common. Well-crafted InMails to senior targets with specific, relevant context can exceed 25%.
Do InMails count against LinkedIn's connection request limits?
No. InMails and connection requests are separate systems with separate limits. InMail credits are a monthly allocation based on your subscription tier. Connection request volume limits are dynamic and tied to account health and acceptance rate. Using InMails does not reduce how many connection requests you can send.
What happens if someone does not reply to my InMail?
If an InMail does not receive a reply within 90 days, the credit is not returned. If it does receive a reply, the credit is returned to your monthly balance. LinkedIn also allows you to send a follow-up to an unreplied InMail, though best practice is to wait at least 5 to 7 days before following up, and limit follow-ups to one.
Can I send a connection request after sending an InMail?
Yes, and this is a common sequencing approach for senior targets. Send an InMail first to get direct inbox visibility, wait 7 to 10 days, and if there is no reply, follow up with a connection request. If they accepted the InMail conversation but did not connect, the request now has context and acceptance rate improves significantly.
PhewDo's LinkedIn engine supports both connection request sequences and InMail campaigns from a single dashboard, with AI personalisation, safe pacing, and unified inbox for all replies. For outreach that combines LinkedIn, email, and WhatsApp without managing three separate tools, see PhewDo at phewdo.com/app.