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Circle alternatives

Circle is free to start with paid plans from Professional $89/mo + Email Hub add-on (free under 100 contacts; +$99/mo at 10K contacts). Here are the other 102 platforms in this directory, with the same fact set for each: free tier, starting price, API, and MCP support.

beehiivAPIMCP
Newsletters, podcasts, and community in one platform · Free tier · from $43/mo (Scale, annual billing); tiered by subscriber count
www.beehiiv.com
SubstackAPIMCP (community)
Writers making money doing the work they believe in · Free tier · from No monthly fee; 10% of paid subscription revenue plus Stripe fees
substack.com
MailchimpAPIMCP
Email and SMS marketing minus the learning curve · Free tier · from $13/mo (Essentials, 500 contacts); scales with contact count
mailchimp.com
AWeberAPIMCP (community)
Email marketing for small businesses · Free tier · from $12.49/mo (Lite, annual billing); scales with subscriber count
www.aweber.com
FlodeskAPIMCP
Design-first email marketing for small businesses · Free tier · from $25/mo (Lite, up to 1,000 subscribers); subscriber-based
flodesk.com
BigMailerAPI
Email marketing for agencies and multi-brand teams · Free tier · from $7.50/mo per 5,000 contacts (Business Lite); contact-count based
www.bigmailer.io
Kit (formerly ConvertKit)APIMCP
Email-first operating system for creators · Free tier · from $39/mo (Creator, at 1,000 subscribers); subscriber-based
kit.com
Constant ContactAPIMCP (community)
Digital and email marketing for small businesses · from $12/mo (Lite); contact-count based
www.constantcontact.com
Campaign MonitorAPIMCP (community)
Straightforward email marketing for growing businesses · Free tier · from $12/mo (Lite); subscriber-count based
www.campaignmonitor.com
MoosendAPI
Intuitive email marketing and automation platform · from $9/mo (Pro, 500 subscribers); subscriber-count based
moosend.com
EmailOctopusAPI
Budget-friendly, simple email marketing · Free tier · from $9/mo (Pro, billed yearly); scales with subscriber count
emailoctopus.com
GetResponseAPI
All-in-one marketing (email, automation, webinars) · from $19/mo (Starter, 1,000-contact list); list-size based
www.getresponse.com
DripAPIMCP
Ecommerce brands · from $39/mo (up to 2,500 people); scales with list size and sends
www.drip.com
ActiveCampaignAPIMCP
Marketing automation plus CRM · from $15/mo (Starter, 1,000 contacts); contact-based
www.activecampaign.com
KlaviyoAPIMCP
Ecommerce/B2C brands running email + SMS on customer data · Free tier · from $20/mo (email, up to 500 profiles); active-profile based
www.klaviyo.com
OmnisendAPIMCP
Ecommerce email + SMS · Free tier · from $11.20/mo (Standard, up to 500 contacts); contact-based
www.omnisend.com
Benchmark EmailAPI
Small businesses wanting powerfully simple email · Free tier · from $27/mo (Pro, 2,500-contact minimum tier); contact-based
www.benchmarkemail.com
iContactAPI
Beginners wanting easy business email marketing · from $9/mo after trial; contact-count based
www.icontact.com
EmmaAPI
Multi-team, multi-location orgs and franchises · from Custom quote (Lite/Teams/Corporate; contact sales)
myemma.com
SenderAPI
Growing small businesses on a budget · Free tier · from $7/mo (Standard); subscriber-based
www.sender.net
StripoAPI
Designing HTML email templates without code · Free tier · from $20/mo (Basic)
stripo.email
SendloopAPI
Small businesses wanting simple email marketing · Free tier · from $39/mo (Pro, up to 45,000 subscribers)
sendloop.com
Twilio SendGridAPIMCP
Developers sending email at scale via API · from $19.95/mo (Essentials)
sendgrid.com
MailjetAPIMCP
Teams sending marketing and transactional email together · Free tier · from $9/mo (Starter, 8,000 emails/mo)
www.mailjet.com
PostmarkAPIMCP
Developers needing fast, reliable transactional email · Free tier · from $15/mo (Basic, 10,000 emails)
postmarkapp.com
SendPulseAPIMCP
Multichannel marketing (email, SMS, chatbots) on a budget · Free tier · from EUR 8.80/mo (Standard, billed annually)
sendpulse.com
Zoho CampaignsAPI
SMBs already in the Zoho ecosystem · Free tier · from $3/mo (Standard, billed annually)
www.zoho.com/campaigns
BrevoAPIMCP
SMBs wanting all-in-one marketing plus CRM · Free tier · from $9/mo (Starter)
www.brevo.com
MailWizzAPI
Self-hosters and agencies running their own ESP · from $59/yr or $79 one-time lifetime (Regular license)
www.mailwizz.com
HubSpot Marketing HubAPIMCP
Marketing teams on an all-in-one CRM platform · Free tier · from $20/mo/seat (Starter; $7/mo/seat new-customer promo)
www.hubspot.com
MailPoetAPI
WordPress/WooCommerce sites sending email from WP · Free tier · from $10/mo (Business at 500 subscribers; subscriber-based)
www.mailpoet.com
MailgunAPIMCP
Developers sending transactional email via API · Free tier · from $15/mo (Basic, 10,000 emails/mo)
www.mailgun.com
Elastic EmailAPIMCP
Budget-focused senders wanting marketing tools plus an email API · Free tier · from $29/mo (Starter, up to 2,500 contacts; contact-based)
elasticemail.com
MailUpAPI
Businesses and agencies doing email + SMS with unlimited sends · from EUR 48/mo (Starter, billed annually; pay-per-speed, unlimited sends)
mailup.com
Pepipost (Netcore Email API)APIMCP
High-volume transactional email at enterprise scale · Free tier · from Not listed publicly; contact sales
netcore.ai
MailerLiteAPIMCP
Solopreneurs and small businesses on a budget · Free tier · from $12/mo (Comfort; subscriber-based)
www.mailerlite.com
GhostAPI
Independent publishers combining site, newsletter, and memberships · from $18/mo (Starter, billed yearly; member-count based)
ghost.org
ButtondownAPI
Indie writers wanting a minimal, API-first newsletter · Free tier · from $9/mo (subscriber-based)
buttondown.com
LoopsAPI
SaaS teams sending product, marketing, and transactional email · Free tier · from $49/mo (contact-based; unlimited sends)
loops.so
AcumbamailAPIMCP (community)
Email + SMS campaigns for SMEs and agencies · Free tier · from EUR 18/mo (Basic)
acumbamail.com
Amazon SESAPIMCP
High-volume sending at lowest unit cost · from $0.10 per 1,000 emails (pay-as-you-go)
aws.amazon.com/ses
BentoAPIMCP
SaaS founders and small businesses · from $29/mo
bentonow.com
Bloomreach EngagementAPIMCP
E-commerce personalization · from Custom quote
www.bloomreach.com/en/products/engagement
BlueshiftAPIMCP (community)
Lean teams scaling cross-channel engagement · from From $1,250/mo (Starter, billed annually)
blueshift.com
BrazeAPIMCP
Cross-channel customer engagement at scale · from Custom quote
www.braze.com
CampaignerAPI
Advanced email marketing without full-suite cost · from $14/mo (Essentials, 1,000 contacts)
www.campaigner.com
CleverReachAPIMCP (community)
GDPR-compliant newsletters for SMEs · Free tier · from EUR 15/mo
www.cleverreach.com
ClickFunnelsAPI
Entrepreneurs running sales campaigns without tech skills · Free tier · from $97/mo Launch ($81/mo annual): 10K contacts, 50K emails/mo; automation workflows from Scale $197/mo
www.clickfunnels.com
CordialAPI
Real-time messaging for enterprise consumer brands · from Custom quote
cordial.com
Customer.ioAPIMCP
Data-driven personalized customer journeys · from $100/mo
customer.io
DotdigitalAPIMCP
Mid-market and enterprise cross-channel marketing teams · from Custom quote
dotdigital.com
SAP Engagement CloudAPI
Personalized omnichannel engagement at scale · from Custom quote
www.sap.com/products/crm/emarsys.html
EnchargeAPI
Behavior-based emails and onboarding for B2B SaaS · from $79/mo (annual, up to 2,000 subscribers)
encharge.io
FluentCRMAPIMCP (community)
Email marketing automation inside WordPress · Free tier · from $90/yr single-site license (reg. $129/yr)
fluentcrm.com
GMassAPIMCP (community)
Cold email outreach and mass email inside Gmail · from $20/mo (Standard, billed annually; $29.95 monthly)
www.gmass.co
GoDaddy Websites + Marketing EmailMCP
Small businesses emailing customers from their GoDaddy website · Free tier · from $9.99/mo Basic (annual) with 100 email sends/mo; Premium $14.99/mo = 25,000 sends/mo
www.godaddy.com/websites/website-builder
HighLevel (GoHighLevel)APIMCP
Agencies and SMBs wanting marketing, CRM, and sending in one place · Free tier · from $97/mo Starter + LC Email usage ~$0.675 per 1,000 emails
www.gohighlevel.com
IterableAPIMCP
Enterprise brands running cross-channel engagement · from Custom quote
iterable.com
Kajabi EmailAPIMCP
Creators replacing separate email tools with an all-in-one platform · Free tier · from $69/mo Kickstarter ($55/mo annual), marketing emails included, 250 contacts
kajabi.com
KartraAPI
Solopreneurs running funnels, checkout, and email in one platform · from $59/mo Essentials (500 contacts, 10,000 emails/mo); Starter $119/mo has unlimited emails
kartra.com
KeilaAPIMCP (community)
Privacy-conscious newsletters powered by open source · Free tier · from EUR 8/mo (Keila Cloud XS, 2,000 emails/mo)
www.keila.io
ListmonkAPIMCP (community)
Performance and features in a single binary · Free tier · from Free (open source)
listmonk.app
ListrakAPI
Retail and e-commerce cross-channel personalization · from Custom quote
www.listrak.com
MailBlusterAPIMCP (community)
Sending bulk email at low cost via Amazon SES · Free tier · from $60/yr Pro (per brand) + $0.60 per 1,000 emails
mailbluster.com
MailcoachAPIMCP
Bootstrappers, creators, and developers · from $9.99/mo hosted (2,000 emails); self-hosted license $249 one-time
mailcoach.app
MailerSendAPIMCP
Transparent pricing from side projects to agencies · Free tier · from $5.60/mo billed yearly (Hobby, 5,000 emails)
www.mailersend.com
MailmeteorMCP (community)
Sales, marketing, and recruiting outreach from Gmail · Free tier · from $5.99/mo (Starter, per user)
mailmeteor.com
MailmodoAPIMCP
Interactive emails that drive conversions · from $149/mo (Lite, billed annually)
www.mailmodo.com
MailrelayAPI
High-volume sending on a free plan · Free tier · from EUR 48/mo (100,000 emails); prepaid packs from EUR 40
mailrelay.com
Mailster
Self-hosted newsletters without subscription fees · from $39 first yr Starter (promo; reg. $79/yr)
mailster.co
MailtrapAPIMCP
Testing and sending in one platform · Free tier · from $15/mo (Email API Basic, 10,000 emails)
mailtrap.io
Adobe Marketo EngageAPIMCP (community)
B2B lead management and ABM · from Custom quote
business.adobe.com/products/marketo/adobe-marketo.html
MoEngageAPIMCP
Enterprise consumer brands (retail, fintech, media) · from Quote-only (contact sales)
www.moengage.com
OmedaAPIMCP
Media companies, publishers, events businesses, and associations · Free tier · from Custom quote (no published pricing)
www.omeda.com
OneSignalAPIMCP
Product teams wanting push, email, and SMS in one platform · Free tier · from $19/mo (Growth: 20,000 email sends included, then $1.50 per 1,000)
onesignal.com
OngageAPI
High-volume email senders using multiple SMTP/ESP connections · Free tier · from $399/mo (Starter, up to 1M emails/SMS per month)
www.ongage.com
Oracle Eloqua Marketing AutomationAPIMCP (community)
Enterprise B2B campaign orchestration · from From $2,000/mo (Basic, 10,000 contacts, per Oracle price list)
www.oracle.com/cx/marketing/automation
Oracle Responsys Campaign ManagementAPI
High-volume B2C email campaigns · from Custom quote (price list is per 1,000 interactions, annual minimums)
docs.oracle.com/en/cloud/saas/marketing/responsys.html
OrttoAPIMCP
Journeys that drive revenue on unified customer data · from Custom quote
ortto.com
ParagraphAPIMCP
Early-stage startups and founder-led teams · Free tier · from $16/mo (Starter, billed annually)
paragraph.com
Podia Email
Creators running email, courses, and community in one place · from $42/mo Mover, email included up to 100 subscribers
www.podia.com/email
PostalAPI
Self-hosted SendGrid/Mailgun alternative · Free tier · from None; self-hosted, infrastructure costs only
github.com/postalserver/postal
PrivyAPIMCP (community)
Small ecommerce stores growing sales with email and SMS · Free tier · from $30/mo
www.privy.com
ResendAPIMCP
Developer-first transactional email · Free tier · from $20/mo (Pro, 50,000 emails)
resend.com
RoblyAPI
Small businesses seeking higher open rates · from $15/mo (annual, up to 500 contacts)
www.robly.com
Sailthru (Zeta Global)API
Media, publishing, and retail brands · from Custom quote
zetaglobal.com/sailthru
Salesforce Marketing Cloud EngagementAPIMCP (community)
Enterprise B2C email and journey marketing · from From $2,000/mo (Pro+ edition, billed annually)
www.salesforce.com/marketing/engagement
Seguno
Shopify merchants who want email marketing inside the Shopify admin · Free tier · from $35/mo
www.seguno.com
SelzyAPI
Small businesses starting with email · Free tier · from $7.50/mo (Lite, up to 100 contacts)
selzy.com
SendFoxAPI
Affordable email marketing for content creators · Free tier · from $29 one-time (Lifetime); Pro from $19/mo
sendfox.com
SendLayerAPIMCP
Email deliverability without high costs · from $5/mo billed annually (Starter, 1,000 emails)
sendlayer.com
SendyAPIMCP (community)
Newsletter sending without monthly fees · from $69 one-time license
sendy.co
Shopify EmailAPIMCP
Emails built for commerce · Free tier · from Included with any Shopify plan; overage $1 per 1,000 emails past the free 10k
www.shopify.com/email-marketing
SmartrMailAPIMCP (community)
Ecommerce stores wanting simple automated product emails · Free tier · from $14/mo
www.smartrmail.com
SMTP.comAPI
Managed high-volume email delivery · from $25/mo (Essential, 50,000 emails, shared IP)
www.smtp.com
SMTP2GOAPIMCP (community)
Reliable delivery with hands-on support · Free tier · from $10/mo (Starter, 10,000 emails)
www.smtp2go.com
SocketLabsAPI
Email sending plus performance analytics · from $39.95/mo (Core, 40,000 emails)
www.socketlabs.com
Squarespace Email CampaignsAPIMCP (community)
Effortless on-brand email for Squarespace sites · Free tier · from Separately billed add-on tiered by sends; entry price shown in-account (third-party reports ~$8/mo annual)
www.squarespace.com/email-marketing
Systeme.ioAPIMCP
Launching an online business with one tool · Free tier · from $17/mo (Startup)
systeme.io
VerticalResponseAPI
Easy email marketing for small businesses · from $13/mo (Basic, under 500 contacts)
www.verticalresponse.com
Wix Email MarketingAPIMCP
Professional campaigns that drive site traffic · Free tier · from Paid Email Marketing plans upgraded in-dashboard (third-party reports from ~$10/mo)
www.wix.com/ascend/email-marketing
YAMM (Yet Another Mail Merge)
Freelancers, educators, and small businesses merging from Sheets · Free tier · from $25/yr (Pro, gmail.com accounts; annual billing only)
yamm.com

Compare the whole field

The comparison table shows all 103 platforms in one view, including Circle.