Custom ERP vs SAP, Odoo and Zoho
Most Indian mid-market ERP decisions come down to these four. They fail in different ways: SAP on cost and complexity, Odoo on implementation partner quality, Zoho on depth once you outgrow it, and custom on execution risk. Here is how to tell which failure applies to you.
Custom / source-available ERP
Built or licensed with source, configured to your process
SAP B1, Odoo or Zoho One
Established products with partner ecosystems
Side by side
| Criterion | Custom / source-available ERP | SAP B1, Odoo or Zoho One |
|---|---|---|
| Cost (50 users, year 1) | One plan price, regardless of user count | SAP ₹25 lakh+; Odoo ₹6–12 lakh; Zoho ₹4–8 lakh |
| How cost scales | Flat — adding users costs nothing | Per user, rising with every hire |
| Implementation risk | Depends entirely on your partner | Depends entirely on your partner |
| Time to go live | 8–14 weeks | SAP 4–9 months; Odoo 2–5 months; Zoho 3–8 weeks |
| GST, e-invoice, e-way bill | Built for Indian statute from the start | Zoho strong; Odoo via localisation modules; SAP needs configuration |
| Depth of standard functionality | What you build or licensed | Decades of accumulated capability |
| Ecosystem and available talent | Limited to your vendor | Large partner and hiring pool |
| Third-party app marketplace | None | Extensive, especially Odoo and Zoho |
| Ability to change core behaviour | Complete — you hold the source | Constrained by the product's model |
| Exit cost | Low; annual plans include the source code and your data | High; migration off a mature ERP is a project |
Choose SAP B1, Odoo or Zoho One when
The cases where we are not the right answer.
- You need breadth immediately across many functions and cannot wait to build it
- Your requirements are conventional and well served by the product's standard model
- You value a large hiring and partner pool over control of the roadmap
- You want a marketplace of ready integrations rather than commissioning each one
- You are a multinational needing statutory support across many countries — SAP earns its cost here
Choose Custom / source-available ERP when
- Per-user licensing is becoming a material and growing cost as you hire
- Your process is unusual enough that the product needs heavy customisation anyway — at which point you are paying twice
- You have been quoted for customisation that costs more than the licence
- You want the source code so you are not dependent on one vendor's continued goodwill — our annual plans include it
- Indian statutory handling is central and you do not want it bolted on
Our honest view
If your processes are conventional, buy Zoho or Odoo and implement them well — that is genuinely the lowest-risk path and we will tell you so. SAP is right when you have the complexity and the budget to match; below about ₹200 crore turnover it usually is not. Custom or source-available ERP earns its place when customisation quotes start rivalling licence costs, when per-user fees are compounding, or when you need to own the system outright. The decisive question is not which product is best but how far your process sits from the standard model.
Common questions
Is Odoo not effectively custom, since it is open source?
Partly. You can modify Odoo, but you are modifying a large framework with its own conventions, and every core upgrade risks breaking your changes. That upgrade tax is the cost people underestimate. It is a real option, just not the free-customisation option it is sometimes presented as.
We were quoted ₹40 lakh for SAP B1. Is that reasonable?
For licences, implementation and first-year support at mid-market scale, that is within a normal range rather than obviously inflated. The question is whether you need what it provides. If the quote is mostly customisation to make SAP behave like your existing process, that is the signal to look at alternatives.
What happens if our ERP vendor disappears?
With SAP, Odoo or Zoho, the software continues and you find another partner. With a custom system, it depends entirely on whether you hold the source code and documentation. Never accept a custom ERP where you do not — it is the single most important clause in the contract.
Still not sure which way to go?
Tell us the situation. We will give you a straight answer, including when that answer is that you should not hire us.