Email marketing for online stores: Klaviyo, Omnisend and others compared
Pricing last verified: — may be outdated; check the vendor page
Online stores usually care about integrations with their store platform and about automations (welcome flows, cart reminders). We could not test those, so this page sticks to published plan limits and gives you a checklist for the parts only a trial can answer.
Plans compared
| Tool | Plan | Price | Billing basis | Contacts | Sends | Source / confidence |
|---|---|---|---|---|---|---|
| Klaviyo | Free | $0 | n/a | 250 active profiles | 500 email sends/month | source · Vendor-published |
| Klaviyo | $20/mo | monthly | 251-500 active profiles | expanded email sends (exact allowance not captured) | source · Vendor-published | |
| Omnisend | Free | $0 | n/a | 250 contacts | 500 emails/month | source · Vendor-published |
| Omnisend | Standard | $16/mo | monthly | 500 contacts | 12 emails per contact (6,000/month) | source · Vendor-published |
| Mailchimp | Free | $0 | n/a | 250 contacts | 500 emails/month (max 250/day) | source · Vendor-published |
| Mailchimp | Essentials | $13/mo | monthly, starting price at 0-500 contacts | 500 contacts | 10x contacts (5,000/month) | source · Vendor-published |
| Brevo | Free | $0 | n/a | not captured | 300 emails/day | source · Vendor page via search excerpt |
| Brevo | Starter | $9/mo | monthly ($97 yearly) | 500 contacts | 5,000 emails/month | source · Vendor-published |
| Sender | Free Forever | $0 | n/a | 2500 subscribers | 15,000 emails/month | source · Vendor-published |
| Sender | Standard | $10/mo | monthly (about $8.25/mo billed yearly); sources conflict, see notes | 1,000 subscribers (entry tier per vendor help center) | 12,000 emails/month (12x) | source · Sources conflict |
What the published numbers say
- Klaviyo, Omnisend and Mailchimp all list about 250 contacts/profiles and 500 sends a month on free plans.
- Sender lists 2,500 subscribers and 15,000 emails a month free; Brevo lists 300 emails a day.
- Klaviyo's paid plan is priced by active profiles (about $20 at 251-500); Omnisend's Standard starts at $16 for 500 contacts with 12 emails per contact; Brevo prices by email volume.
Check these in a trial (we have not verified them)
- A native connection to your store platform (Shopify, WooCommerce, etc.) and how product data syncs.
- Whether cart-abandonment, browse-abandonment and post-purchase automations are in your plan tier.
- How the vendor counts "active" contacts and whether SMS is billed separately (Klaviyo's free tier lists a $5 mobile-message credit).
Vendors: Klaviyo · Omnisend · Mailchimp · Brevo · Sender. (No affiliate relationship exists for Klaviyo or Mailchimp.)
Klaviyo
Free plan: up to 250 active profiles and 500 email sends a month. The Email plan is $20/month for 251-500 active profiles (vendor structured data; the exact send allowance is not stated there). Klaviyo is mostly marketed to online stores. It has no public affiliate program, so we earn nothing from Klaviyo links.
Omnisend
Free plan: 250 contacts and 500 emails a month. Standard is listed from $16/month for 500 contacts with 12 emails per contact (6,000 a month). Omnisend positions itself for online stores.
Mailchimp
Free plan: 250 contacts and 500 sends a month (max 250 a day). Paid plans start with Essentials and Standard; the entry prices we captured are for 500 contacts. Mailchimp has no publisher affiliate program (its "Mailchimp & Co" program is built for agencies managing client accounts), so we do not earn from Mailchimp links.
Brevo
Free plan is capped by sends per day (300 emails a day) rather than by a small contact count. Starter is listed at $9/mo for 500 contacts and 5,000 emails; Standard at $18/mo. Brevo prices on email volume, which is a different model from contact-based pricing.
Sender
Free Forever plan: 2,500 subscribers and 15,000 emails a month. Standard starts at the 1,000-subscriber tier with 12,000 emails a month (12x subscribers, Sender help center). Sender's own pages disagree on the entry price (a $7 "starting at" marketing line, about $10 in structured data), and independent trackers list about $15 at 1,000 subscribers, so check the live slider before relying on any of them.
What we could not verify
- Feature depth, ease of use, deliverability and support quality. We did not test these products, so we make no claims about them.
- Prices for larger lists: we captured the entry paid tier and the free plan only. Use each vendor's calculator for your list size.
Sources
- Klaviyo: https://www.klaviyo.com/pricing (checked Oct 28, 2026)
- Omnisend: https://support.omnisend.com/en/articles/3533018-omnisend-pricing-plans-2026 (checked Oct 28, 2026)
- Mailchimp: https://mailchimp.com/pricing/marketing/ (checked Oct 28, 2026)
- Brevo: https://help.brevo.com/hc/en-us/articles/208580669-FAQs-What-are-the-limits-of-the-Free-plan (checked Oct 28, 2026)
- Brevo: https://www.brevo.com/pricing.md (checked Oct 28, 2026)
- Sender: https://www.sender.net/pricing/ (checked Oct 28, 2026)
- Sender: https://www.sender.net/help/account-settings-and-billing/how-sender-pricing-works/ (checked Oct 28, 2026)
Sources marked "third-party" are pricing guides, not vendor pages; the confidence label in each table explains which figures need re-checking. Full data: pricing-data.json.
Questions or corrections: gb1@mail.grokbot.com. Prices change often; always confirm on the vendor's own page before you buy.