Sourcing passive candidates on LinkedIn: how to get more replies

Why sourcing passive candidates via LinkedIn matters so much

Passive candidates are people who are open to something new but aren't actively applying. In tight sectors such as IT, consultancy or engineering, this group is often far bigger than the small pool of active candidates. So you miss out on suitable people if you only rely on a job ad on your website or a job board.

Sourcing passive candidates is about sparking interest rather than making an offer straight away. People first want to understand why you've chosen them, what you have to offer, and that you're not pressuring them. LinkedIn is the logical channel for this. Here you can see someone's role, sector, education and shared contacts. That way you can approach people via LinkedIn with messages that suit the person, not just the vacancy.

Sourcing passive candidates starts with a sharp strategy

Before you message someone, you need to know who you're looking for and how to address that person. That starts with segmentation. A junior frontend developer is triggered by learning and growth opportunities, while an experienced consultant is more likely to respond to autonomy, social impact or an intellectual challenge. So the content of your message changes per audience. The degree of scarcity also plays a role. For hard-to-fill roles, it's more important to make contact at an earlier stage, even if someone isn't actively looking yet.

The tone needs to match your employer branding. By that we mean how your organisation presents itself as an employer in messages. Consistency helps here. Within agency teams, it's useful to agree on style and tone, so the whole team's communication stays recognisable. This matters especially in the reality of recruitment agencies, where speed and quality come together.

The phase before sending a message is called talent sourcing: searching in a targeted way for the right people based on role, experience and sector. This strengthens your preparation and makes writing easier. Good information increases your chances of arriving with a relevant hook. That makes the difference in your first contact.

Sourcing passive candidates through LinkedIn connection requests

A connection request is a short invitation to connect, with the aim that someone clicks "accept". Only after that can you send a more detailed message, or you can go straight for an InMail. Either way, the rule is the same: the more relevant your message, the bigger the chance of a reply.

A good connection request text meets three principles:

• Short: a maximum of 300 characters and preferably 1 to 2 sentences.
• Concrete: you write why you want to connect with this person, with a clear hook (for example a project or sector).
• Neutral: you don't mention a vacancy or role in this first message.

Good example: "Hi Anna, I saw your work on supply chain at [company]. That closely matches what I follow in recruitment, I'd like to connect."

Less good example: "Hi Anna, we're looking for someone like you for logistics roles with responsibility. Can I call you about this?"

Make sure your invitation encourages contact, rather than being aimed directly at selling something. At this point you mainly want to build a bridge. Our tool helps with drafting personal connection requests. You choose from suggestions based on style and sector, and you always adjust these yourself before sending.

Sourcing passive candidates with strong InMails and personal outreach

Sometimes it's better to send an InMail directly. You do this, for example, when you already know for certain that someone is a good fit for the role or client, or if you don't have much time to wait for someone to accept your connection request. Aim your InMail at a low-pressure conversation, not straight at a placement.

Use this structure for a good InMail:

• Start with what caught your eye in the profile (project, role, publication).
• Briefly explain why you're approaching this specific person.
• Make a simple proposal: an exploratory conversation, introduction or informal chat.
• Close with an open question, without pressure, a pitch, or asking for a CV.

InMail example: "Hi Jeroen, your involvement in urban mobility caught my eye. I speak on behalf of a scale-up that's just moving into smart traffic data. Fancy a call about it sometime? No obligation, just exploring."

Personal outreach considerably increases your chances of a reply. People quickly sense whether you've genuinely seen them. So avoid generalities, over-the-top compliments or a lengthy explanation of the vacancy. A good InMail example shows that less text often has more impact. People are more likely to reply when the message is personal and clear.

Sourcing passive candidates with smart follow-ups and timing

Many recruiters give up too quickly when a reply doesn't come. But hearing nothing often simply means "didn't have time" or "forgot for a moment". One or two extra messages are perfectly normal then, as long as you stay friendly and substantive. The tone of your follow-up message as a recruiter should differ from your first message. Add something new or take a different angle.

Examples of good follow-ups:

"Hi Mark, just a quick reminder. If it's not for you or now isn't a good time, that's completely fine. If you ever want to chat about opportunities in life sciences, I'd love to hear from you."

"Hi Kelly, I'll be in Manchester next week visiting a client in your field. Coffee, no strings attached, is always on if you fancy it."

Leave at least three days between messages when following up. That way it doesn't feel pushy. Never send everything on the same day. This also stops you running into LinkedIn's limits. Working smart and spread out gives you more visibility without it looking like spam. That benefits the candidate experience.

Sourcing passive candidates at scale: limits, GDPR and measurable results

When outreach happens at larger scale, volume plays a role. LinkedIn limits how many connection requests and InMails you can send per week. This protects users from spam and forces recruiters to choose quality. That's why it's wise to only use recruitment automation where it genuinely helps: for example, reusing openers or scheduling messages, but without losing the human tone.

Also pay close attention to privacy. Under GDPR, you may approach people if there's a legitimate interest. That means you need to be clear about your purpose, not keep data longer than necessary, and stop immediately if someone shows no interest. Careful communication helps build trust, especially with passive candidates.

Want to know what works? Measure these three things:

• How many connection requests get accepted.
• How many InMails lead to a reply.
• How much time you spend on average per message.

With small tweaks, you can already influence these figures. Take a look at the case study on time savings and better messages to see how other recruiters approach this.

How our copilot in LinkedIn helps you source passive candidates

We offer a copilot built into LinkedIn Recruiter (Lite and Seat). This gives you personally tailored text suggestions for connection requests and InMails. You select 25 profiles per search. You then receive one concrete text suggestion per profile, which you can always adjust before sending.

The benefits:

• You keep full control over content, tone and timing.
• You save time, because you don't have to think up opening lines from scratch every time.
• Within a recruitment team, it's easier to align on shared formats and style.

This workflow fits with how you already work in LinkedIn Recruiter. Instead of starting from zero, you build on suggestions that already fit well. You can find out more about this in our LinkedIn integration.

Take the next step with your LinkedIn outreach

Sourcing passive candidates works better when you align segmentation, tone and timing well. Strong messages lead to more connections, better replies, and ultimately growth of your talent pipeline. Small improvements in your message content can already make a big difference to the candidate experience. So take a critical look at your approach.

• Rewrite a few of your standard messages using the tips from this article.
• Discuss within your team how you handle tone, follow-up and planning.
• Start measuring. Look at response rates, time per message and which hooks land.

Do you have questions about style, segmentation or where our copilot can help your team? Get in touch. We're happy to think along with you about how personal outreach can become faster and more effective within your LinkedIn approach.

Frequently asked questions

What's the difference between a connection request and an InMail?

A connection request is a short invitation to connect with someone. The aim is for the other person to add you as a connection. After that, you can seek more detailed contact. An InMail is a direct message to someone you don't yet have a connection with. You use this when you want a faster reply, or when a connection request goes unanswered.

How often can you follow up with someone on LinkedIn?

It's common to send one or two follow-up messages, each with at least three days in between. Make sure every follow-up adds something new, and respect it if someone doesn't reply or says no.

What's a good acceptance rate for connection requests?

A rate between 30 and 50 percent is normal. Above 50 percent often means you've segmented well and sent a relevant, personal invitation.