Email is the one marketing channel you own. Social media algorithms change, ad costs rise, and organic reach decays. But your email list is an asset that stays yours. A list of 2,000 engaged subscribers typically generates more revenue per campaign than 20,000 social media followers, because the audience opted in and your message lands in their inbox directly rather than competing with algorithmic noise.
For small businesses, email serves three distinct functions: acquiring new customers (via lead nurturing sequences), retaining existing customers (via newsletters and re-engagement campaigns), and reactivating past customers (via win-back sequences). Most small businesses focus entirely on acquisition and ignore the two highest-ROI functions.
| Platform | Free tier | Paid starts at | Automation | Best for |
|---|---|---|---|---|
| Mailchimp | 500 contacts / 1,000 emails/mo | $13/mo | Basic (free), full (paid) | First-time email marketers, general small business |
| Klaviyo | 250 contacts / 500 emails/mo | $20/mo | Advanced (all plans) | E-commerce, product businesses, Shopify stores |
| ConvertKit | 1,000 subscribers (broadcast only) | $25/mo | Paid plans | Creators, coaches, course sellers |
| Constant Contact | No (60-day trial) | $12/mo | Lite automation | Local businesses, nonprofits, event-driven sends |
| Brevo (Sendinblue) | 300 emails/day unlimited contacts | $25/mo | Yes (all plans) | Transactional + marketing combo, budget-focused |
- Welcome sequence (3-5 emails over 7-10 days). Sent automatically when someone joins your list. Email 1: deliver what you promised (lead magnet, discount code, confirmation). Email 2: your story and why you do this work. Email 3: your most useful content or most common customer question answered. Email 4-5: social proof and a soft offer. This sequence runs automatically and does the heavy lifting of trust-building before any sales conversation.
- Post-purchase or post-service sequence (3-4 emails over 30 days). Sent after a purchase or completed project. Email 1: thank you + what to expect. Email 2: check-in at 7 days, offer a resource related to their purchase. Email 3: 30-day check-in + review request. Email 4: referral ask with a specific incentive. Most businesses skip this entirely and leave significant revenue and review volume on the table.
- Re-engagement sequence (2-3 emails). Sent to subscribers who have not opened an email in 90-180 days. Email 1: “We miss you: here’s something useful.” Email 2: “Still want to hear from us? One click to stay on the list.” Email 3 (if no engagement): remove them. Maintaining list hygiene by removing disengaged subscribers protects your open rates and sender reputation.
Subject lines drive open rates more than any other factor. But not in the way most people think. The most effective subject lines for small businesses are specific and conversational, not clever or clickbait. “How to cut your payroll taxes by $3,000 this year” outperforms “You will not believe this tax tip” because specificity implies credibility. Send time matters significantly: Tuesday-Thursday between 9-11am in the recipient’s time zone is the most-studied high-open window, though testing your specific list will outperform any general benchmark.
Building out your full digital marketing strategy alongside email?
