Cold email is sending an unsolicited email to a prospect who has no prior relationship with you. Done right, it's one of the highest-ROI outbound channels for B2B startups — low cost, infinitely scalable, and highly measurable. Done wrong (generic, spammy, pushy), it burns your domain and wastes everyone's time. The fundamentals: strong targeting, a one-line hook, a clear why-them/why-now, and a simple CTA.
For example, a cold email that converts might be 4 sentences: one line establishing relevance (you just hired 3 SDRs), one line naming the specific problem that creates, one line on your solution, and one CTA asking if it's worth 15 minutes.
We run cold email programs for clients at scale — writing copy, managing deliverability infrastructure, and A/B testing until reply rates consistently hit 3–8%.
Relevant Cactus Services
We implement Cold Email strategies for B2B tech startups every day. Book a free 30-minute call to get a concrete plan for your situation.
Book a free strategy call →Ideal Customer Profile (ICP)
Your ICP is the precise description of the company most likely to buy, stay, and expand.
Sales Development Representative (SDR)
An SDR is the outbound hunter on your sales team — their job is to generate qualified meetings, not close deals.
Business Development Representative (BDR)
A BDR is similar to an SDR but often focuses on larger, more strategic accounts or outbound into new markets rather than a defined territory.
Total Addressable Market (TAM)
TAM is the total revenue opportunity if you captured 100% of your target market.
Serviceable Addressable Market (SAM)
SAM is the portion of TAM you can actually reach with your current GTM motion.
Serviceable Obtainable Market (SOM)
SOM is the slice of SAM you can realistically capture in the next 12–24 months given your resources, competition, and execution capacity.