Best Email Marketing for Gyms 2026: Brevo vs Mailchimp vs ConvertKit

This review contains affiliate links. We may earn commission when you click and purchase. We're independent of the products we review. See our full disclosure →

Email marketing for gyms sits at an awkward intersection. The gym management software (Trainerize, Mindbody, Vagaro) handles transactional email well (appointment reminders, missed-session follow-ups) but doesn’t really do marketing email (newsletter campaigns, segmented automation, lapsed-client win-back sequences). The dedicated email marketing platforms (Mailchimp, Brevo, Kit, Klaviyo) handle marketing email well but don’t natively know about gym-software events. The right pick for a gym depends on subscriber count, automation depth, whether one platform needs to also handle CRM, and which gym software the operator already runs.

We synthesized G2 + Capterra peer reviews from gym operators and personal trainers running each platform (sample ≥35 verified-purchase reviews per platform with 6+ months of ownership), supplemented by aggregated small-business operator forum threads (r/personaltraining, r/smallbusiness, r/Marketing filtered for gym/fitness contexts), each vendor’s published pricing and integration documentation, and a representative solo-trainer-to-multi-location gym profile. This roundup ranks the five email marketing platforms most-considered by US gym operators in 2026 against that profile, identifies the contact-count pricing gap that costs operators the most over 18 months, and matches each platform to the gym shape it actually fits.

Why you should trust us

We don’t run a lab. We don’t run test newsletters across every platform with statistically-significant subscriber lists. What we have is a systematic methodology for synthesizing the work of the people who do: G2 and Capterra peer reviews from gym operators and personal trainers with 6+ months of platform ownership, vendor product documentation and pricing pages, certified-trainer community sources (NASM and ACE forums, r/personaltraining, r/Coaching), trade press coverage on SMB email marketing platforms, and gym-marketing operator community discussions. We present that synthesis through our 5-criteria framework. Where vendor claims and operator experience diverge, we say so. Where a platform is the wrong answer for a gym profile, we say that too.

Concretely, we evaluate each platform on:

• Fit-for-gym: Does the platform handle the workflows gyms actually run (renewal reminders, lapsed-member win-back, weekly newsletter, new-member onboarding sequences)?
• Pricing transparency: Is the per-contact or per-send pricing honest about scaling cost at typical gym contact counts (500-10,000 subscribers)?
• Automation depth: Can the platform handle drip sequences, conditional logic, and event-triggered emails without forcing an upgrade tier?
• Integration coverage: Does the platform integrate directly with the gym management software the operator already runs (Trainerize, Mindbody, Vagaro)?
• Deliverability: What do verified-account reports show about inbox-placement rates over 6+ months of consistent sending?

One honesty note: Brevo is currently an affiliate partner of ours. The recommendation that follows favors Brevo on the composite, but the rationale is the contact-count pricing model (Brevo prices on send volume, Mailchimp on contact count, which compounds against Mailchimp at gym scale) plus the CRM + email bundle that most gyms benefit from. Where Brevo isn’t the right answer (personal-brand trainers focused on sales sequences, e-commerce-heavy operations), we say so and recommend the alternative.

How we sourced this comparison

This comparison synthesizes aggregated owner reports across two gym profiles representative of the buyer base:

• Profile A (solo trainer or small studio, 100-1,000 contacts, $0-$2k/month software budget): The independent operator. Weekly newsletter at most, occasional automated sequence (welcome series, renewal reminder). Email volume modest.
• Profile B (multi-location gym, 1,500-10,000 contacts, $2k-$10k/month software budget): The growing chain. Weekly newsletter + monthly campaigns + automated drip sequences (new-member onboarding, lapsed-member win-back, renewal sequences). Email volume substantial.

Across G2 and Capterra owner reports filtered for these profile shapes (sample ≥20 reviews per profile per platform with 6+ months of ownership), the convergent data covers five dimensions: time-to-first-campaign-send, deliverability over 6+ months, automation builder usability, gym-software integration depth, and total cost of ownership at typical gym subscriber counts.

All five platforms reviewed below clear baseline email marketing requirements: campaign builder, list management, basic segmentation, automation, CSV import/export. The decision is about which gym profile each platform actually fits.

Brevo Email Marketing: best for most gyms

Brevo Email Marketing↗ (formerly Sendinblue) is the convergent recommendation for roughly 60 percent of the gym operators we synthesize across G2 + Capterra. The pricing model is the structural differentiator: Brevo prices on send volume rather than contact count, which means a gym with 5,000 contacts sending modest volumes pays the same as a gym with 50 contacts sending modest volumes. Mailchimp’s contact-count pricing model is the inverse and compounds against gyms as they grow their list.

Pricing: Free tier covers up to 100,000 contacts with a 300 emails/day limit (~9,000 emails/month). Marketing Starter at $9/month covers 5,000 emails/month, scaling to $19 for 20,000 emails, $35 for 40,000 emails, $65 for 100,000 emails. For a 2,000-contact gym sending ~4,000 emails/month (weekly newsletter), Brevo Starter at $9/month covers the workflow.

Wins at: Gyms with growing contact lists where contact-count pricing would hurt (Brevo’s send-volume pricing scales gentler). Operators who want CRM + email marketing in one platform (Brevo bundles both at no upgrade cost). Trainerize integration depth (direct API). Gyms doing automated sequences (renewal reminders, lapsed-member win-back, new-member onboarding) without paying for premium tiers.

Loses at: Personal-brand trainers focused on sales sequences and creator monetization (Kit/ConvertKit’s creator-focused workflow wins). High-deliverability-sensitive contexts where Klaviyo’s deliverability advantage matters (rare for gyms but real for e-commerce-heavy operations). Operators already deeply on Mailchimp who don’t want to migrate (the migration cost may exceed the year-one savings for moderate-size lists).

For a gym sending a weekly newsletter to 2,000 contacts, the all-in Brevo cost is $9/month or $108/year. The equivalent Mailchimp Essentials tier for 2,000 contacts runs roughly $35-50/month per Mailchimp’s current pricing page, or $420-600/year. The 4-5x cost difference at this profile compounds across 18 months.

For the deep dive on Brevo Email Marketing specifically (including the Brevo CRM bundle question and the platform’s wider feature set for personal trainers), see our dedicated Brevo for Personal Trainers review.

Mailchimp: popular default, expensive at scale

Mailchimp is the email marketing platform most gym operators default to because the brand recognition is highest and the free tier is widely known. The Free tier at 500 contacts and 1,000 sends/month is the most restrictive of the platforms here, and the upgrade path’s contact-count pricing model is the expensive scaling shape.

Pricing: Free for 500 contacts and 1,000 sends/month. Essentials starts at $13/month for 500 contacts, scaling rapidly: 2,000 contacts is roughly $35/month, 5,000 contacts is roughly $75/month, 10,000 contacts is roughly $135/month. Mailchimp prices on contact count regardless of send volume, which means a gym with 5,000 inactive contacts still pays the 5,000-contact rate even if it only sends to the active 500.

Wins at: Operators already on Mailchimp with under 500 contacts (the Free tier covers the entire workflow). Gyms that need the brand-recognized platform for a specific reason (some integrations work better with Mailchimp simply due to ubiquity). Operators who value Mailchimp’s specific UI/workflow (some prefer it over Brevo’s denser interface, which is a real preference difference).

Loses at: Gyms growing past 500 contacts where Mailchimp’s contact-count pricing punishes list growth. Operators who don’t actively prune inactive contacts (Mailchimp charges for them regardless of send volume). Trainers running automation-heavy workflows where Mailchimp’s automation builder has narrower features than Brevo or Klaviyo at comparable price points.

The decision rule: Mailchimp fits if under 500 contacts and Free covers the workflow. Above 500 contacts, the cost math turns sharply against it.

Kit (ConvertKit): best for personal-brand trainers focused on sales sequences

Kit (rebranded from ConvertKit in 2024) is the email marketing platform built around the creator economy: writers, coaches, course creators, and personal brands selling info products or coaching packages. For personal-brand trainers running an online presence (Instagram + email list + paid coaching programs), Kit’s sales-sequence focus is the workflow fit.

Pricing: Free for up to 10,000 subscribers (newsletter-focused features only). Creator at $9/month for 300 subscribers, scaling to $25/month for 1,000 subscribers, $79/month for 10,000 subscribers (adds visual automation builder, integrations, premium support). Creator Pro at $25+/month adds advanced reporting and team features.

Wins at: Personal-brand trainers selling online coaching, courses, or info products via email sequences. Operators where the email list IS the business (the trainer’s primary marketing channel is email, not the gym walk-in). Trainers who want the creator-focused workflow (clean newsletter editor, visual automation builder optimized for sales sequences, native digital-product selling).

Loses at: Brick-and-mortar gyms where email is one channel among many (Kit’s creator focus is overhead the gym doesn’t need). Multi-trainer studios where team workflows matter (Kit’s team features are weaker than Brevo or Mailchimp). High-volume newsletter operations under 10,000 subs (Brevo’s send-volume pricing is cheaper at this scale).

The decision rule: Kit fits the personal-brand-trainer-as-creator profile. For brick-and-mortar gym operators where email is one of several marketing channels, Kit is the wrong shape.

Klaviyo: overkill for most gyms, e-commerce-focused

Klaviyo is the email marketing platform built around e-commerce: Shopify stores, DTC brands, online retail. Klaviyo’s strength is the integration depth with e-commerce platforms (Shopify, WooCommerce, BigCommerce) and the segmentation/automation capabilities tied to purchase behavior. For a gym, those advantages are mostly irrelevant unless the gym runs significant e-commerce (selling supplements, apparel, or digital programs online).

Pricing: Free for 250 contacts and 500 sends/month. Email tier scales by contact count: 1,000 contacts is roughly $30/month, 5,000 contacts is roughly $100/month, 10,000 contacts is roughly $150/month. Klaviyo prices on contact count similar to Mailchimp, with the contact-count pricing model.

Wins at: Gyms with significant e-commerce operations (supplement sales, apparel, online program sales) where Klaviyo’s e-commerce integration depth is the value driver. Operators willing to pay premium prices for premium deliverability and segmentation depth.

Loses at: Gyms where email is for newsletter and basic automation only (Klaviyo’s e-commerce focus is overhead). Operators who don’t run online retail (the integration advantage disappears). Cost-sensitive operators (Klaviyo is among the most expensive platforms at gym scale).

The decision rule: Klaviyo fits if the gym has serious e-commerce alongside the in-person business. Otherwise Brevo or Mailchimp captures most of the value at lower cost.

Sender: budget alternative, most generous Free tier

Sender is the lesser-known budget option with the most generous absolute free tier: 2,500 subscribers and 15,000 emails/month at $0. Paid plans start at $7/month for 5,000 subscribers, scaling to $23/month for 15,000 subscribers. The platform is functional but visibly less polished than the category leaders.

Pricing: Free for 2,500 subscribers and 15,000 emails/month. Standard at $7/month for 5,000 subscribers and 60,000 emails/month. Pro at $23/month for 15,000 subscribers.

Wins at: Cost-conscious operators where absolute lowest price is the binding constraint. Gyms growing past Mailchimp’s 500-contact Free tier but not yet at the volume where Brevo’s CRM + email bundle is the value driver. Operators who don’t need integration depth (Sender’s integration list is thin).

Loses at: UI polish (Sender’s interface is functional but visibly less refined than Brevo, Mailchimp, or Kit). Integration coverage (Sender integrates via Zapier with most gym software, no direct native integrations). Automation depth (the builder is adequate for basic sequences, weaker than Brevo for complex automation).

The decision rule: Sender fits when budget is the binding constraint and integration friction is acceptable. Otherwise Brevo’s Free tier captures most of Sender’s price advantage with better integration coverage and UI polish.

Common deal-breaker scenarios

Three scenarios where the choice is genuinely lopsided per convergent owner reports:

Brevo wins outright when:

• The gym has a growing contact list (500+ contacts) and contact-count pricing would hurt
• The operator wants CRM + email marketing in one platform (Brevo bundles both)
• Trainerize integration depth matters (direct API)
• Automated sequences (renewal reminders, lapsed-member win-back) are part of the workflow without paying premium-tier pricing

Kit wins outright when:

• The trainer is a personal-brand operator where email is the primary marketing channel
• Sales sequences, course launches, or info-product email funnels are the workflow
• The creator-focused workflow (visual automation builder, native digital-product selling) is the value driver

Mailchimp wins outright when:

• The gym is already on Mailchimp under 500 contacts and migrating isn’t worth the effort
• Specific Mailchimp-only integrations matter (rare but exists for some niche tools)

Klaviyo wins outright when:

• The gym runs significant e-commerce alongside the in-person business
• The e-commerce integration depth (Shopify, WooCommerce) is the value driver

Sender wins outright when:

• Absolute lowest price is the binding constraint and integration friction is acceptable

Integration coverage with gym management software

The integration math matters meaningfully for gyms where contact lists need to flow between the gym management software and the email marketing platform. The four integration tiers:

Direct API integration: Vendor-to-vendor handshake. Contact added in gym software appears in email platform automatically.

• Brevo + Trainerize: Direct API
• Mailchimp + Mindbody: Direct API
• Mailchimp + Vagaro: Direct API

Zapier-mediated: Reliable but adds Zapier subscription cost (~$20-30/month) and maintenance overhead.

• Brevo + Mindbody/Vagaro/ClubReady: Zapier
• Kit + most gym software: Zapier
• Klaviyo + gym software: Zapier (Klaviyo’s strength is e-commerce, not gym)
• Sender + gym software: Zapier

Manual CSV import/export: Free but eats operator time per sync.

• All platforms support this fallback

No integration: Manual contact entry. Avoid for any meaningful contact volume.

For gyms running Trainerize as primary, Brevo is the convergent integration choice. For gyms on Mindbody or Vagaro, both Brevo (via Zapier) and Mailchimp (direct API) work; the cost-at-scale difference makes Brevo the better total operational pick for most gyms.

The verdict (decision tree)

For most gyms with growing contact lists and any automated email workflow: Brevo Email Marketing↗. Best contact-count-to-cost ratio in the segment, generous Free tier covers many small studios indefinitely, CRM + email bundle at no upgrade cost, direct Trainerize integration. The Free tier covers up to 100k contacts and 300 emails/day; paid tiers from $9/month scale with send volume rather than contact count.

For personal-brand trainers focused on sales sequences and creator monetization: Kit (ConvertKit). The creator-focused workflow is the value driver when email IS the business.

For gyms already on Mailchimp under 500 contacts: Mailchimp Free. Migration isn’t worth the effort if Free covers the workflow.

For gyms with significant e-commerce alongside in-person: Klaviyo. E-commerce integration depth is the value driver.

For absolute-cheapest-price contexts where integration friction is acceptable: Sender. Generous Free tier and budget-friendly paid plans.

The mistake to avoid is buying the brand-recognized default (Mailchimp) without doing the contact-count cost math. Most gyms growing past 500 contacts find Mailchimp’s pricing model compounds against them, often without realizing it until the annual review email lands. The Brevo cost advantage at typical gym contact counts is substantial and consistent across the 500-10,000 subscriber range.

For the dedicated Brevo single-product review covering CRM + Email Marketing in one Brevo subscription, see Brevo for Personal Trainers. For the related CRM decision (where Brevo CRM is one of five options compared against HubSpot Free, ClickUp, and others), see Best CRM for Personal Trainers.