Marketing stack arbitrage, decoded

Every marketing SaaS has a cheaper way. We show the math.

HubSpot Marketing Pro costs $13,680 in year one. EspoCRM self-hosted does the same job for $168. That gap is real, and it's the same story for Mailchimp, Ahrefs, Calendly, and every other bloated marketing tool. We show you which alternative to pick, what you actually give up, and how to switch without breaking your funnel.

Replace HubSpot → Replace Mailchimp → Replace Ahrefs →

Popular swaps

HubSpot

$13,680/yr

Pricing scales aggressively with contacts and seats. Onboarding fee is mandatory. Feature bundling forces users to pay for modules they don't use.

EspoCRMTwentyBrevo (formerly Sendinblue)activecampaign

Mailchimp

$1,620/yr

Price jumps sharply once contact list grows past 500. Automation limited on lower tiers. Free plan capped at 500 contacts (down from 2000).

ListmonkMauticMailerLiteBrevo (formerly Sendinblue)

Ahrefs

$1,548/yr

Ahrefs raised prices multiple times in 2023-2025. Starter plan lost bulk features. Costs $1500+/year even at entry.

SerpBearopenseoseo-panelubersuggest

Calendly

$432/yr

Per-seat pricing multiplies for teams. Cal.com self-host has same features free.

Cal.comeasyappointmentsralllysavvycal

Semrush

$1,680/yr

Similar to Ahrefs but more feature-bloated. Entry tier limits are aggressive.

SerpBearopenseoserankinganswerthepublic

Marketing OSS in our index

Snapshot: 2026-07-24

Project	Replaces	Stars	Last push
Cal.com Open-source scheduling infrastructure	calendly savvycal acuity	33.4k	2026-07-24
Twenty Modern open-source CRM, TypeScript + GraphQL	hubspot salesforce	25.8k	2026-07-24
Listmonk Self-hosted newsletter and mailing list manager	mailchimp convertkit constantcontact	17.5k	2026-07-22
EspoCRM Open-source CRM for SMB marketing and sales teams	hubspot salesforce zoho	13.2k	2026-07-23
Mautic Open-source marketing automation platform	hubspot marketo activecampaign	8.1k	2026-07-24
SerpBear Self-hosted keyword rank tracker	ahrefs semrush seranking	4.6k	2026-07-20

Currently tracking 6 open-source projects against 5 marketing SaaS categories. Growing weekly.

How we're different from Zapier's blog

Year-one true cost

We compute onboarding fees, seat overage, contact overage. Not just the sticker price on the pricing page.

Self-host and cheap SaaS, together

We recommend Listmonk when you'll self-host and Brevo when you won't. No one-size-fits-all listicle.

We actually deployed them

Every deploy guide comes from us running the software on Hetzner or DigitalOcean. Real screenshots, real gotchas.