The verdict
On the data we hold, it's close: neither pulls ahead on features, a free plan or AI access. The choice comes down to how you work.
What the data says
- Both have a free plan, so you can try each before you pay.
- Only Mermaid has an MCP server, so an AI employee can work in it directly.
- In our Tech stack ranking, Mermaid places 15 and Sendcloud 48 of 72.
Side by side
Plans and pricing
Mermaid
- BasicFree plan with up to 3 diagrams, limited diagram size and limited AI.Free
- PlusUnlimited diagrams and 300 AI credits a year; 10 per user per month billed annually.$120/yr/seat
- Premium2,000 AI credits a year, free viewer seats and unlimited teams; 20 per user per month billed annually.$240/yr/seat
Sendcloud
- FreeNo subscription fee and no courier contract needed, up to 20 parcels per month.Free
- LiteEUR 28 per month plus EUR 0.10 per label; 3 users, 3 integrations, up to 4,800 labels per year.€28/mo
- GrowthEUR 87 per month plus EUR 0.09 per label; 5 users, branded returns and tracking, up to 12,000 labels per year.€87/mo
- PremiumEUR 175 per month plus EUR 0.08 per label; 10 users, advanced returns, analytics, up to 120,000 labels per year.€175/mo
- ProEUR 639 per month plus EUR 0.07 per label; unlimited users, up to 360,000 labels per year, customer success manager.€639/mo
Prices as the vendors list them. They change often; the final price is on their sites.
Who each is for
Choose Mermaid if…
Developers, technical writers and operations teams who keep diagrams as text next to their code and docs, so they stay versioned and never turn into stale screenshots.
Choose Sendcloud if…
Online shops that ship enough parcels to want several carriers, branded tracking and a returns portal without building shipping logistics themselves, mainly in Europe.
Other options worth a look
ToolCombines spreadsheet simplicity with database structure so teams build custom workflows, trackers and apps without code.Tech stack
From $20/mo yearlyFree planAffiliate link
ToolCombines documents, spreadsheets, and databases into one workspace for building custom trackers and internal tools.Tech stack
From $10/moFree plan
ToolGet instant answers to questions backed by live web search results and inline source citations.Tech stack
From $20/moFree plan
ToolBundle business email, shared documents, spreadsheets, and video meetings in one cloud subscription.Tech stack
From €6.80/moAffiliate link
ToolCall Claude models from your own code to build AI applications, agents, and automations.Tech stack
ToolCollects event data and routes it to your warehouse and 200+ business tools with open-source infrastructure.Tech stack
From $265/moFree plan