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Accredo Saturn vs Mercury: which edition fits your business?

Plain-English comparison of Accredo Saturn and Mercury — when to choose which, when to upgrade, and what changes for your team.

Accredo ships in two editions: Mercury and Saturn. Per Accredo’s own product positioning, Mercury is aimed at small-to-medium businesses operating from a single location, while Saturn is built for businesses of any size operating across multiple locations, branches or departments. The decision between them isn’t always made by the buyer; sometimes a Partner picks one and the customer never thinks about it again. But the right choice matters because changing later is more painful than getting it right up front.

This is the practical “which one?” guide.

The 30-second answer

Pick Mercury if:

  • You operate from a single location
  • You don’t need departmental or branch-level reporting
  • You’re running a relatively contained chart of accounts and a simple operational footprint
  • You want the lowest entry price

Pick Saturn if:

  • You operate from multiple locations, branches, or warehouses
  • You need branch- or department-level P&L
  • You consolidate across multiple operating units
  • You’re growing in a direction where complexity is increasing year over year

Most NZ wholesalers, distributors, and manufacturers running ten or more staff end up on Saturn within two to three years even if they started on Mercury.

Where they differ in practice

Multi-branch / multi-location

This is the headline difference. Mercury is single-location. Saturn handles multi-location natively — multiple physical sites with their own stock counts, their own AR/AP, and consolidated reporting at the group level.

If you’re running stock in two warehouses today and reconciling them with spreadsheets, you want Saturn. Accredo’s published case studies include businesses consolidating multiple Mercury installs into a single Saturn deployment once branch complexity gets real.

Departmental and branch reporting

Saturn lets you tag transactions with a branch and a department. Run the GL → see P&L by branch, by department, or consolidated. Mercury doesn’t model this; you’d build it with custom GL account ranges, which works but doesn’t scale.

Multi-currency and Foreign Exchange

If you import or export, the Foreign Exchange (FX) module handles exchange-rate revaluation, multi-currency AR/AP, and proper accounting for exchange gains and losses. The FX module is typically licensed alongside Saturn for businesses with real forex exposure — your QSP can confirm what’s included for your setup.

Job Costing

Both editions have the Job Costing (JC) module. JC handles multi-stage projects, work-in-progress accounting, project-level budgets, and profitability tracking. For project-based businesses (construction, engineering), JC is often the reason to be on Accredo at all rather than a more general-purpose accounting tool.

Scale and concurrency

Saturn is built for businesses with bigger teams in Accredo at the same time. If you’ve got 10+ people working concurrently in the company file, you want Saturn.

What stays the same

Both editions share:

  • The same Web Service API — the Mercury and Saturn web services ship at the same release (8.0.x at time of writing)
  • The same modules at a conceptual level (AR, AP, GL, CB, IC, OE, PO, JC, FA — and FX where licensed)
  • The same MaxBasic scripting environment
  • The same upgrade cadence (you get version 8 on either — see the Accredo release notes)
  • The same QSP-led implementation model

So choosing one or the other doesn’t lock you out of the broader Accredo ecosystem. It just sets the ceiling.

When to upgrade Mercury → Saturn

Five signals that you’ve outgrown Mercury:

  1. You’ve added a second physical location and you’re maintaining stock in two systems
  2. You’ve started exporting GL data to Excel for branch-level reporting
  3. You’ve started accepting foreign-currency invoices (or sending them)
  4. Your team has grown past about 8 concurrent Accredo users and performance is dragging
  5. You’re running long-running projects and the JC module isn’t keeping up

The migration is non-trivial — new database, period boundaries to handle, training. But it’s also a one-time pain. Every week you delay after one of those signals fires is a week of running operations on the wrong tool.

What changes for Rapido customers

Whichever edition you’re on, Rapido works. Same SDK, same MCP server, same B2B portal, same integrations. The Accredo Web Service API is consistent across editions, so we don’t ask which you’re on until late in the conversation.

What does change:

  • Saturn customers typically use more of the Rapido stack — multi-branch reporting in Snowflake, branch-level Special Pricing in the portal, consolidation views in HubSpot.
  • Mercury customers often start with just the portal and PO2Order, then layer in integrations as they grow.

Talk it through

If you’re trying to decide between Mercury and Saturn, your Accredo Partner is the right person — they know your books and your trajectory. We work alongside Partners (we never replace them) and we’re happy to be on the call when AI/portal/integration questions come up. Drop us a line and we’ll join.

If you’re already on Accredo and trying to work out what to layer on top, book a 30-minute call and we’ll show you what Rapido looks like against your specific edition.

Further reading