Layer 1 or Layer 2: Choosing a Blockchain Platform
Layer 1 is a standalone blockchain network with its own consensus mechanism and security. Layer 2 operates on top of an existing network and processes some operations off-chain. For a business, the choice should not be based on how popular a network is, but on what you need to prove, how many operations you will handle and how the system will connect to payments, ERP, CRM and external APIs.
What Is Layer 1?
Layer 1 is the base layer of a blockchain network. It validates transactions, maintains the ledger and defines the rules by which participants reach consensus. Ethereum, Bitcoin and Solana are examples of Layer 1 networks, but each uses a different model for security, speed and smart contract execution.
When you build a solution on Layer 1, you usually use an existing public network. Less often, a business creates its own Layer 1 network. This only makes sense when you need specific validation rules, your own token, control over participants or independence from someone else’s infrastructure.
The advantage is a direct connection to the main network. Its consensus mechanism protects the data and transactions, while integration with wallets and other applications is often easier. The downside is that you pay for the capacity limits and congestion of the network you choose.
What Is Layer 2?
Layer 2 is an additional layer built on top of Layer 1. It accepts multiple operations, processes them off-chain and periodically records the result or a proof back on Layer 1. This reduces the number of transactions that the main network must process directly.
For users, this usually means lower fees and faster confirmation. For a business, however, the architecture becomes more complex. You need to assess the bridges between the layers, the time required to withdraw to Layer 1, token support and how the system behaves if the additional layer has a problem.
Layer 2 is not automatically more secure or cheaper at all times. The benefit depends on the specific network, its load, the proof mechanism used and how the integration is implemented.
What Is the Difference Between Layer 1 and Layer 2?
| Criterion | Layer 1 | Layer 2 |
|---|---|---|
| Scalability | Limited by the capacity of the main network | Higher through batching and processing transactions off Layer 1 |
| Fees | Depend on the load and rules of the main network | Usually lower, but there may be costs for transferring to Layer 1 |
| Security | Provided directly by the consensus mechanism of the main network | Depends on Layer 1 and the security of the additional layer itself |
| Speed | Confirmation follows the rules of Layer 1 | The user operation is often confirmed faster |
| Integrations | More direct interaction with wallets, exchanges and development tools | Additional configuration, bridges and compatibility checks are required |
| Operational risk | Fewer infrastructure components | More components to monitor and maintain |
The table is useful for an initial selection, but it does not replace technical analysis. For example, a low fee is irrelevant if the customer has to wait a long time to transfer an asset to the mainnet or if your payment provider does not support the selected layer.
When does a business actually need blockchain?
Blockchain makes sense when several independent parties need to share a record without any one of them having full control over the database. This applies to provenance tracking, digital assets, payments, rewards, access rights and transactions between organisations.
A suitable example is a platform for trading cryptocurrencies that needs to connect user profiles, Bulgarian lev payments, wallets, checks and transaction history. When developing Crypto.bg, an important part of the task is not just the blockchain, but the entire system around it.
Blockchain is not a good choice if all participants belong to one company and a standard relational database solves the problem. The same applies if the data needs to be edited frequently, if personal information must not leave a controlled environment, or if there is no clear process that benefits from an immutable ledger.
How do you choose between Layer 1 and Layer 2?
- 01Describe the business operation
Break the process down into specific actions: profile creation, payment, asset transfer, confirmation, cancellation and reporting. For each action, specify who performs it, what is recorded, and whether the record needs to be public and immutable.
- 02Define the volume and response time
It is not enough to say that the system needs to be fast. Describe when the operation should appear in the profile, when it is considered final, and what happens if confirmation fails. This shows whether Layer 1 can handle the process or whether Layer 2 is needed.
- 03Choose what stays off-chain
Personal data, documents, images, internal notes and large reports are usually stored in a secure database. A hash, identifier, status or transaction is recorded on the blockchain when that is sufficient for verification.
- 04Check the wallets and external services
Before development, check the payment providers, custodial wallets, KYC services, exchanges, notifications and accounting system. If several systems need to be connected, plan API integrations rather than manually transferring data.
- 05Choose the network and fee model
Compare user fees, how fees are paid, smart contract support, development tools and the availability of ready-made libraries. Also check how the system will respond to network congestion or changes to the network rules.
- 06Build a prototype with a real-world scenario
Before full development, build a small flow: create an operation, sign it, record it, confirm it and display the result in an admin panel. The prototype shows where delays, additional fees and user experience issues arise.
- 07Plan for security and maintenance
You need role management, key protection, limits, an activity log, backup procedures and transaction monitoring. The smart contract should be tested separately, and changes to it should follow a clear approval process.
How is a customised blockchain system built?
The first phase is the business and technical specification. It describes the users, assets, roles, payment flows, confirmation rules, required reports and the boundary between the blockchain and the standard database.
Next comes the architecture. This determines whether to use Layer 1 or Layer 2, the smart contract model, how keys are stored, public and private access, and the connections to a web application, mobile app, ERP, CRM and external services.
The smart contracts and application layer are then developed. Users should not need to understand gas, RPC connections or confirmations to complete an operation. The interface should clearly show the status, fee, error and next action.
Testing covers functional scenarios, load, resubmitting an operation, a lost connection, an invalid signature and an unauthorised access attempt. For a financial or crypto platform, fraud checks, limits and identification processes are also added where applicable.
Finally, the system is launched in stages. Start with a limited flow and monitoring, then add new roles, assets and integrations. Maintenance includes updating libraries, monitoring the network, reviewing logs and responding to changes in providers or protocols.
What budget should you plan for blockchain development?
A blockchain project is usually customised software, not a ready-made module with a fixed price. The indicative development budget for a customised ERP, platform or business system is €3,000–€29,300. It covers projects of different scopes, so blockchain functionality cannot be estimated based only on the number of screens.
| What affects the price | What it includes |
|---|---|
| The selected layer | Transaction fees, bridges, RPC services, and test and production environments |
| Smart contracts | Number of contracts, rules, roles, limits, pausing and the need for an independent audit |
| User interface | Web application, mobile app, wallet, admin panel and notifications |
| Integrations | Payments, KYC, exchanges, accounting, ERP, CRM and reporting systems |
| Security and compliance | Key management, logging, audits, monitoring and access processes |
| Maintenance | Monitoring, dependency updates, protocol changes and incident response |
If the project uses an existing Layer 1 or Layer 2 network, this is usually more practical than building your own network. A custom Layer 1 adds validators, infrastructure, protocol governance, monitoring and long-term operational risk. This part is described specifically in the proposal because there is no universal measured cost for every architectural option.
The price falls toward the lower or upper end of the range depending on the number of integrations, the complexity of the smart contracts, security requirements and the need for mobile apps. The most reliable estimate comes after describing one real process and prototyping the critical transaction.
What should you check before commissioning the project?
- Who owns the code, configuration and access to the infrastructure?
- How are private keys managed and who can sign operations?
- What happens if a Layer 2, bridge or RPC service provider goes down?
- How will a profile be recovered if the user loses access to their wallet?
- Which data is stored on the blockchain and which remains in the business's database?
- Is there a test environment, an activity log and a plan for updating the smart contracts?
- How will fees, errors, delays and failed transactions be measured?
Frequently asked questions
Which is better for a business application: Layer 1 or Layer 2?
There is no universal answer. Layer 1 is more suitable when direct security and compatibility with the main network are the priorities, while Layer 2 is a sensible choice for a high volume of operations and fee sensitivity. The decision is made after analysing the specific process.
Is Layer 1 more secure than Layer 2?
Layer 1 gets its security directly from the underlying consensus. Layer 2 uses this security differently and adds its own software, bridges and procedures, which also need to be checked.
Can a blockchain system connect to ERP and CRM?
Yes. The usual approach is for the blockchain to record only the necessary transactions or proofs, while ERP and CRM store the operational data, customers, invoices and reports. The connection is made through API and events, with clear rules for errors or delayed confirmation.
How much does it cost to develop a blockchain platform?
Custom development falls within the €3,000–€29,300 range, but the exact proposal depends on the selected layer, smart contracts, wallets, integrations and security requirements. A custom Layer 1 network is assessed separately because it involves additional infrastructure and maintenance.
Frequently asked questions
- Which is better for a business application: Layer 1 or Layer 2?
- Layer 1 is suitable when direct security and compatibility with the main network are the priorities. Layer 2 is a sensible choice for a high volume of operations and fee sensitivity.
- Is Layer 1 more secure than Layer 2?
- Layer 1 gets its security directly from the underlying consensus. Layer 2 adds its own software and bridges, which also need to be checked.
- Can a blockchain system connect to ERP and CRM?
- Yes. The blockchain can record transactions or proofs, while ERP and CRM store the operational data, customers, invoices and reports through API.
- How much does it cost to develop a blockchain platform?
- Custom development falls within the €3,000–€29,300 range, but the exact proposal depends on the layer, smart contracts, wallets, integrations and security. A custom Layer 1 network is assessed separately.
