How to run cold outbound at a startup without a sales team
Founder-led cold outbound in one workspace: find prospects for free, write emails with AI that cites its sources, approve every send, and handle replies.
5 min read
Key takeaways
- Cold outbound at a startup works best as a small, repeatable routine: a focused list, short relevant emails, a daily review, and fast replies.
- In Opser Sales, searching for people is free. You pay only to find an email address, usually 3 to 4 credits a person, and nothing if you already have it.
- AI writes each message from your prompt and shows the evidence it used, and by default nothing sends until you approve it in the Master Inbox.
- Sales watches every sending mailbox's bounce and reply rates, pauses one that's bouncing, and can set up separate domains and inboxes so outreach never touches your main domain.
- A positive reply becomes a deal in Customers in one step, so the conversation flows straight into your pipeline.
Cold outbound gets hard when a founder has to carry every step in their head. A promising contact sits in one tab, the research in another, and a draft waits somewhere else. By the time a reply arrives, you've forgotten why you wrote to that person in the first place.
What works at a startup is a small, repeatable routine: find people who fit, keep them in one focused list, send short messages that are relevant to them, approve each send, and answer replies fast. Today we're launching Sales in Opser to run exactly that routine, next to your customers and your AI agent. Here's how to do founder-led outbound well, with or without it.
How do you find prospects for a startup?
Start with one sentence: who has the problem you solve, and how would you recognize them? For example, "heads of marketing at B2B software companies with 20 to 200 people in the US." That sentence becomes your filters.
In Sales, searching for people is free. Filter by job title, seniority, industry, location, company size, and technologies, and look through the results before spending anything. You pay only when you want someone's email, usually 3 to 4 credits a person through a chain of email finders that stops at the first verified address, and nothing if the lead already has one. Save the filters as your ideal customer profile so the next search starts from the same definition.
Selling to local businesses works differently. The Map finds businesses of a given type around an address or city, like dentists in Austin, for free from open data, with phone numbers and websites. For a few credits each, Sales can check a business against Google Maps to confirm it's open and see its rating and reviews, and it can look for the owner's name.
How do you build a cold outbound list?
Treat each list as one audience with one reason to reach out. "Owners of independent clinics who still schedule by phone" is a list. "Interesting people I found this week" isn't. When you have a second idea, start a second list.
Read the list before you write a word. Drop anyone whose role doesn't fit or whose company is clearly the wrong size, rather than trying to make up for a weak match with more personalization. A list of 40 people who really fit beats 400 who might.
If you want the list to keep growing on its own, add signals: Sales checks for new people who match every day, like people active in your space or companies hiring for a role your product helps with. Signals are optional and charge credits as they run, with a daily budget you set.
How do you write cold emails with AI without sounding like AI?
Each list feeds one campaign, a short sequence of steps a few days apart. A step can be a template you write once, or a prompt that Sales uses to write each person's message, like "introduce our scheduling tool in three sentences, mention the problem their role usually has, and ask for a 15-minute call." Good cold emails are short, specific, and ask for one thing.
What keeps AI emails from sounding like AI is evidence. Every message Sales writes shows the facts it's based on, so you can see why it mentions someone's role or their company's hiring. Campaigns start in manual mode, which means every message waits in the Master Inbox until you approve it. Edit it, ask for a rewrite, or approve it as it stands. Once a campaign has earned your trust, you can switch it to send automatically.
Sales also protects you from the classic mistakes. People on your do-not-contact list are skipped, and nobody gets two sequences at once, even if they appear on two lists.
How do you send cold email without hurting your domain?
Connect the mailboxes you want to send from in Sales' settings and share them with your team. Each campaign sends inside a window and at a daily pace you choose, and the Queue shows who gets what next and why anything is waiting.
Sales tracks every sending mailbox's bounce, complaint, and reply rates and pauses a mailbox that starts bouncing before it does lasting damage. Most teams keep cold outreach off their main domain entirely. Sales can set that up from inside the app: a new domain for $15, Google inboxes at $5 a month each, up to five per domain, and optional warm-up for $4 a month, or pre-warmed inboxes at $10 that are ready to send. It's paid from your workspace credits, and the inboxes appear as senders without you touching a DNS record.
What should happen when a prospect replies?
A reply means the sequence is done and the conversation has started. Sales stops the sequence for anyone who replies, and every reply lands in the Master Inbox, where you answer from the same mailbox that started the thread.
When someone's interested, turn them into a deal in Customers in one step, with the reply attached, so the opportunity moves straight into your pipeline. From there, our guide to never missing a customer follow-up picks up the story.
Your agent can help at every stage. Ask it to "find 30 heads of marketing at software companies in Texas, put the best fits on a new list, and draft a three-step sequence," or "summarize this week's replies and turn the interested ones into deals." It does the work through the same tools, and anything that sends or spends waits for your go.
Campaigns can also include LinkedIn steps, like connection requests, messages, and profile views. That part is opt-in: it runs with conservative daily limits and a kill switch, and since LinkedIn has no official API for it, you decide whether to turn it on.
Is a spreadsheet and Gmail enough for founder-led outbound?
For your first 20 emails, yes. A spreadsheet and your inbox are flexible, and they teach you what your market responds to. They stop working when you have to track who is on which step, remember who already replied, and copy promising conversations into a CRM by hand.
That's the point where a dedicated tool pays for itself. Sales keeps the search, the list, the sequence, the approvals, the replies, and the hand-off to Customers in one workspace, with an agent that can do the busywork. Start with one focused list, one short campaign, and a daily review you can keep up.
Frequently asked questions
- How do founders do cold outreach without a sales team?
- Keep it small and daily. Pick one audience you can describe in a sentence, write a short sequence, review and approve the day's messages in one sitting, and answer replies the same day. A tool that keeps the list, the sequence, approvals, and replies together saves the hour a day you'd spend juggling tabs.
- Is prospect search free in Opser Sales?
- Yes. Searching for people by job title, seniority, industry, location, and company size is free, and so is searching the Map for local businesses. Finding an email costs about 3 to 4 credits per person, company search and Google checks on the Map cost credits, and optional signals charge as they run.
- Do AI-written emails send automatically?
- Not by default. Campaigns start in manual mode, where every message waits for your approval in the Master Inbox. You can switch a campaign to automatic sending once you trust it.
- Should I send cold email from my main domain?
- Most teams use a separate domain for cold outreach so a bad week never affects the email your customers rely on. Sales can set one up for you, with Google inboxes at $5 a month each, $15 for the domain, and optional warm-up.
- Can Opser Sales do LinkedIn outreach?
- Yes, as an opt-in extra. Campaigns can add LinkedIn connection requests, messages, and profile views, run with conservative daily limits and a kill switch. LinkedIn has no official API for this, so you decide whether to turn it on.
Founder · Senior Software Engineer
Simone Zamparini is a founder and senior software engineer.
