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Proposals · head to head

Nusii vs Sage 50

Nusii logo

Nusii

Proposals

Small, independent proposal tool for freelancers and agencies, metered by active proposals rather than by send volume

From
$29/month
Rated
-
Full reviewWebsite
Sage 50 logo

Sage 50

Accounting

Windows desktop accounting with the ledger held in a local data file rather than in a browser

From
$29/month
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Nusii the plan limit counts active proposals rather than proposals sent, so an untidy pipeline of stale open proposals will push you into a higher tier even though the actual workload has not changed.; Sage 50 it is a Windows desktop application, so Mac users need a virtual machine or a hosted desktop, and every added remote worker becomes a hosting bill rather than another browser tab.
  • They diverge on capability: Nusii covers Reusable content sections, Sage 50 covers Local company data file.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Nusii and Sage 50 actually diverge.

Attributes where Nusii and Sage 50 differ
AttributeNusiiSage 50
Pricing modelPer month by active proposal countsubscription
PlatformsWebWindows
CategoryProposalsAccounting
FoundedUnknown1981

Identical on both: starting price ($29/month), free tier (No), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Nusii

  • Reusable content sections
  • Templates with variables
  • Open and view notifications
  • Online acceptance
  • Branded proposal pages
  • Automated follow-up reminders

Only in Sage 50

  • Local company data file
  • Nominal, sales and purchase ledgers
  • Bank reconciliation
  • VAT and sales tax handling
  • Stock control
  • Job and project costing
  • Multi user access
  • Microsoft 365 integration

What people use each for

The jobs each tool is most often brought in to do.

Nusii

  • A freelancer who wants proposals that look designed without paying agency prices for a sales platformnot Sage 50
  • A small studio replacing Word documents and PDFs with a trackable web proposal and an accept buttonnot Sage 50
  • Knowing precisely when a client opened a proposal so the follow-up call is timed rather than guessednot Sage 50
  • Standardising scope and terms language across a handful of people so every proposal says the same thing about revisions and paymentnot Sage 50

Sage 50

  • An established small business that wants its accounting data physically in the building rather than on a vendor's serversnot Nusii
  • A construction or trade business needing job costing and stock depth that the entry level cloud products do not matchnot Nusii
  • A company with unreliable internet where a browser only ledger would stop work whenever the line dropsnot Nusii
  • A long standing user with a decade of transaction history in the file for whom migrating to anything else is the expensive optionnot Nusii

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Nusii

  • The plan limit counts active proposals rather than proposals sent, so an untidy pipeline of stale open proposals will push you into a higher tier even though the actual workload has not changed.
  • There is no product catalogue, pricing logic or CPQ capability, so anything involving configurable products, volume tiers or approval rules has to be worked out elsewhere and typed in as text.
  • Direct integrations are almost non-existent and most connections go through Zapier, which means a second subscription and a fragile chain between the proposal and your CRM or accounting system.
  • Acceptance is an online agreement rather than a full electronic signature service with the identity verification and audit trail that regulated buyers and some public sector clients demand.
  • The vendor is a very small independent company, which keeps the product focused and the support personal but concentrates business continuity risk in a way procurement at a larger client may question.

Sage 50

  • It is a Windows desktop application, so Mac users need a virtual machine or a hosted desktop, and every added remote worker becomes a hosting bill rather than another browser tab.
  • Multi user working shares a data file over the network, so all users effectively need to be on the same local network or on the same hosted server, and file corruption in a shared file environment is a recovery from backup rather than a support ticket.
  • The United States and United Kingdom editions are separate products with different tax engines, so a business trading in both markets cannot run one Sage 50 across them, and experience or add ons from one edition do not transfer to the other.
  • Additional users are licensed individually at full price, which means a part time bookkeeper, an approver who signs off purchase invoices and a manager who only ever reads reports all cost the same as the full time finance person.
  • Sage's development effort has moved to its cloud accounting products, so the eventual move off Sage 50 is a re-implementation with historical data conversion and a fresh chart of accounts rather than an in place upgrade, and that project only gets larger the longer the file grows.

Pricing, plan by plan

Nusii

$29/month
  • Freelancer$29/month
    • 1 user
    • 5 active proposals
    • 14 day trial
  • Agency$49/month
    • 3 users included, 19 USD per extra user
    • 20 active proposals
    • Custom branding
  • Business$129/month
    • 5 users included, 29 USD per extra user
    • 50 or more active proposals
    • Priority support

Sage 50

$29/month
  • Pro Accounting$50/month
    • Core accounting
    • 1 user
    • Basic reports
  • Premium Accounting$85/month
    • 5 users
    • Job costing
    • Inventory

Which should you pick?

Choose Nusii if

  • You need reusable content sections.
  • You also want templates with variables.
Nusii review

Choose Sage 50 if

  • You need local company data file.
  • You work on Windows.
  • You also want nominal, sales and purchase ledgers.
Sage 50 review

Questions people ask

Is Nusii or Sage 50 better?
Neither clearly leads. Nusii starts at $29/month and Sage 50 at $29/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Nusii or Sage 50?
Nusii starts at $29/month and Sage 50 at $29/month.
Does Nusii or Sage 50 run on more platforms?
Nusii runs on Web. Sage 50 runs on Windows.
What is Nusii best used for?
Nusii is most often used for a freelancer who wants proposals that look designed without paying agency prices for a sales platform, a small studio replacing word documents and pdfs with a trackable web proposal and an accept button, knowing precisely when a client opened a proposal so the follow-up call is timed rather than guessed, standardising scope and terms language across a handful of people so every proposal says the same thing about revisions and payment. Of those, a freelancer who wants proposals that look designed without paying agency prices for a sales platform and a small studio replacing word documents and pdfs with a trackable web proposal and an accept button are not what Sage 50 is typically brought in for.
What can Nusii do that Sage 50 cannot?
Nusii covers Reusable content sections, Templates with variables, Open and view notifications, Online acceptance. Sage 50 covers Local company data file, Nominal, sales and purchase ledgers, Bank reconciliation, VAT and sales tax handling.

Answered from the vendors’ own pages

Nusii: What counts as an active proposal?

A proposal that has not been archived. Archiving completed and lost proposals frees the slot, so the limit is about pipeline hygiene rather than volume.

Sage 50: Is Sage 50 cloud software?

No. The application runs on Windows and the ledger is a local file. The Sage 50cloud tiers add Microsoft 365 integration and a sync service for remote access, but the accounting itself is still desktop software.

Nusii: Is there a free plan?

No. There is a 14 day trial, then plans start at 29 USD per month, with two months free if you pay annually.

Sage 50: Can my accountant work in it?

Yes, and many accountants in the United Kingdom and the United States know it well. Practically they will either take a backup of the company file, or connect through the remote data access service, or work on a hosted copy. Agree which of those before you start.

Nusii: Does it handle legally binding signatures?

It records online acceptance with a timestamp. For qualified electronic signatures with identity checks you need a dedicated e-signature service.

Sage 50: Does it still require an annual subscription?

Sage moved Sage 50 to subscription licensing, so continued access and tax table updates depend on an active subscription. Confirm what happens to your ability to open historical data if you stop paying.

Nusii: Can several people work on the same proposal?

Yes on the Agency and Business plans, which include 3 and 5 users respectively with additional seats charged separately.

Sage 50: Is the United Kingdom version the same product as the United States version?

No. They share a name and a heritage but they are different codebases with different tax handling. Buy the edition for the country where you file.

Sage 50: What about payroll?

Payroll is a separate Sage product with its own subscription and per employee cost. Budget for it separately rather than assuming the accounting subscription covers it.

Sage 50: How hard is it to move to a cloud system later?

Expect to convert opening balances and a limited window of transaction history rather than the full file, and to redo the chart of accounts, the customer and supplier records and any custom reports. Most businesses do it at a year end for that reason.

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