ActiveCampaign vs Substack

ActiveCampaign is an email marketing and marketing automation platform headquartered in Chicago. Jason VandeBoom founded it in 2003 as on-premises software before it moved to SaaS. Its core job is to send the right email, SMS or WhatsApp message at the right time based on what a contact does, using a visual automation builder with branching logic.

The automation builder handles multi-step journeys with waits, conditions, goals and split tests, triggered by site visits, purchases, form fills, tags or CRM events. Campaigns use 250+ templates and, on Pro, predictive sending, conditional content and attribution. Since 2025 the Active Intelligence layer adds AI agents that build segments, automations and brand kits, a conversational workspace, and a remote MCP server; every plan includes 500 AI credits a month. Plans are priced by contacts: Starter ($19/month for 1,000 contacts billed monthly) covers email and automation, Plus adds landing pages, generative AI and SMS, Pro adds advanced segmentation and three seats, and Enterprise adds SSO, HIPAA support and custom objects. CRM pipelines, WhatsApp and transactional email are add-ons.

ActiveCampaign suits SMBs, ecommerce stores and agencies that need deep automation without HubSpot pricing. Mailchimp is easier for simple newsletters, Brevo and MailerLite are cheaper at large lists, and HubSpot is stronger as an all-in-one CRM.

Buying tip: prices rise steeply with contact count, so clean inactive contacts before upgrading. The 14-day trial needs no card, and annual billing saves roughly 17 to 21%.

Substack is a San Francisco company founded in 2017 by Chris Best, Hamish McKenzie and Jairaj Sethi that gives writers a newsletter, website and subscription business in one account. It handles email delivery, a hosted publication site, comments and Stripe-powered paid subscriptions, so a writer can start for free and charge readers whenever they are ready.

Over time Substack added podcasts, video posts and livestreams, a mobile app where readers follow publications, and a social layer: Notes for short posts, Chat for subscriber communities, and a recommendations network that has become a major source of new subscribers for many writers. Custom domains, sections, imports from other platforms and basic analytics are included. Publishing is free; Substack takes 10% of paid subscription revenue, plus Stripe processing fees.

Substack fits journalists, essayists, researchers and creators who want to build an audience quickly and value the network over control. The 10% fee grows with success, design and SEO options are limited, and the platform's moderation policies and algorithm shape your reach. Paid subscriptions depend on Stripe, so writers in countries Stripe does not serve face extra hurdles. Ghost offers ownership and a flat fee with open-source code, beehiiv adds growth and monetization tools such as an ad network and referral programs, and Kit (formerly ConvertKit) suits creators focused on email marketing and product sales.