Quick answer: Build a prospect list from sources you can explain to the person on the other end: LinkedIn search filters for your audience, the profile of your best existing customers, people who engaged with relevant content or events, and contact lists you have a legitimate right to use. Start with a few hundred well-matched people, not thousands, and check each source against the rules that apply to it.
Why not just buy a list?
Bought lists are tempting because they are fast. They tend to disappoint for four reasons:
- They are old. People change jobs, and a list can be out of date soon after it is made.
- They are generic. Everyone with the list is writing to the same people with the same pitch.
- They carry legal and consent questions. Where the data came from and what permission exists is often unclear. See cold outreach compliance basics.
- They don't match your pace. A new LinkedIn account sends about 5 invites a day at first, ramping toward 20, and never above 30, which is roughly 300 to 400 invites in the first month. You do not need thousands of names, you need a few hundred good ones.
What are the good sources?
| Source | Quality | What to watch |
|---|---|---|
| LinkedIn search with filters | High, and current | Filters only go so far; review profiles by eye |
| Sales Navigator search (optional) | High; finer filters | A paid seat; not required to start. See Sales Navigator vs Premium |
| Lookalikes of your best customers | High; real patterns | Needs a handful of customers to learn from |
| People who engaged with relevant posts or events | Good; a natural reason to write | Only reach out about the topic they engaged with |
| Your own contacts, past leads and warm intros | Highest | Reach out as a person, not as a campaign |
| Lists you imported with permission | Varies | Be sure you have the right to contact them |
| Referrals | Highest | Ask for the introduction, then follow up |
How do you build one step by step?
- Write the audience in one sentence. Role, company size, and a reason they would care. Use how to define your ideal customer profile or the free ideal customer profile worksheet.
- List the exclusions. Competitors, current customers, friends, and anyone who said no.
- Search with two or three filters, not ten. Job title, industry or company size, and location are usually enough. Too many filters leave you with a list that is hard to refresh.
- Open ten profiles and check the match. If they look wrong, change the search before you save a list of hundreds.
- Prefer second-degree connections where you can. They have a mutual connection, which makes a request feel less random.
- Save the search. A saved search lets you top up the list over time instead of rebuilding it.
- Remove duplicates and people you have already contacted. The same person may appear under a different link or name.
- Add a note column. One line on why this person is on the list helps you write a specific message later.
What about finding emails?
Add email only where you have a legitimate reason and a correct address. A work email found for a real person you are contacting is different from a mass scrape. For how to find an address responsibly, see how to find someone's email from LinkedIn. With FollowArc, contact look-ups are paid only when a contact is actually found; misses and verification are free.
What should you leave out?
- Anything gathered against a site's terms. Scraping that breaks a platform's rules can get your account restricted and creates risk for the people on your list.
- People with no clear reason to hear from you. If you cannot say in a sentence why this person might care, remove them.
- Fake or bought profiles and accounts. Never use them to reach people.
- Anyone who has opted out, from you or from anyone you work with.
- Whole lists in one go. Release them in batches, so you can learn from the first batch before you spend the rest.
How big should the list be?
Sized to your pace and your attention. If you can send about 300 to 400 invites in the first month, a list of a few hundred is enough for the first month, and a refreshed list can follow. A smaller list lets you personalize and learn faster. See the invite ramp planner for a pace based on your account.
How do you keep the list healthy?
- Review it every month. People change roles; remove those who no longer fit.
- Track which segments reply and weight the next list toward them. See the outreach metrics that matter.
- Record outcomes so you do not contact someone twice by accident.
Limits and when this is not for you
- Manual building takes time. If you need to reach large numbers of people quickly, tooling will help, but the pace limits still apply.
- Filters are imperfect. Titles are inconsistent, and profiles can be out of date. Always sample by eye.
- Narrow audiences run out. If your market is small, you will cycle back to the same people. Spread contact over months, not weeks.
- Rules differ by region and channel. Take advice for your own situation.
Frequently asked questions
Is it OK to buy a prospect list?
It can be legal in some cases, but quality and consent are often unclear, and the list rarely matches your audience closely. Building your own is slower and usually better.
How many prospects do I need to start?
A few hundred well-matched people is plenty for the first month at a careful pace.
Do I need Sales Navigator?
No. Standard LinkedIn search is enough to start. A Sales Navigator seat gives finer filters if you want them.
Can software keep a list topped up?
Yes. Saved searches can add new matching people on a schedule, so you review additions instead of rebuilding the list.
Where FollowArc fits
FollowArc finds prospects from LinkedIn searches, imported lists, and saved searches that top up a campaign on a schedule. Sales Navigator is not required. Sophia then runs the outreach at a careful pace with your approval. The free ideal customer profile worksheet is a good first step, and you can look around the demo without signing up.