The chain rarely kills a product. The wrong assumption does.
One team picks Ethereum for its tools, then its users won't pay L1 gas.
Another team picks Solana, then routes every write through one account, and it queues.
Ethereum's base fee can rise 12.5% per block.
Both chains can carry a real product. This checklist covers the seven calls you make anyway.
Fees and finality: what your users feel
Fees and finality come first because users feel them on every click. Test both against your busiest flow, not a token transfer.
Check 1: Fees and fee predictability
On Solana, each transaction pays a base fee of 5,000 lamports per signature, and half of it is burned. That comes from the official fee docs.
You can add a priority fee, priced per compute unit you request. The same docs cap a transaction at 1.4 million compute units, so heavy instructions cost more to prioritize.
On Ethereum, fees follow EIP-1559.
The ethereum.org gas docs say the base fee moves by at most 12.5% per block and is burned.
The same page puts a plain ETH transfer at 21,000 gas.
Your contract calls use far more gas than a transfer. The price per unit of gas rises with demand.
What you decide here: who pays the fee, and what happens to your margin when the network gets busy? If you sponsor fees, model your worst day, not your average one.
Check 2: Finality and UX
Ethereum splits time into 12-second slots and 32-slot epochs. It finalizes through checkpoint votes at epoch boundaries, per ethereum.org's proof-of-stake docs.
That works for settlement. A game or a checkout will need an L2 or clear pending states.
Solana switched to its new Alpenglow consensus in epoch 1064 on October 21, 2026, per the Solana upgrade page. The page says the old consensus took about 12.8 seconds to finalize, and the new one targets roughly 150 milliseconds.
Treat that as a target until you measure it on your own RPC path. The upgrade is days old.
Accounts and tooling: how your team builds
Check 3: Account model and tooling
Ethereum contracts hold their own storage. Solana programs hold no state; they read and write separate accounts that each transaction lists up front.
That list is what lets Solana run transactions in parallel when they touch different accounts. The catch is design work.
Here is a common case. A launch writes every mint to one global counter account. Under load, these updates can't run side by side, and your "fast chain" feels slow.
The fix is to split state per user or per shard, so most writes touch different accounts. Do this on paper before you write the program, because moving state later means a migration.
On Ethereum, the matching trap is a storage layout that makes common calls expensive. Both chains reward you for modeling hot paths before you write code.
Tooling follows the model. EVM teams use Solidity with Foundry.
Solana teams use Rust, often with Anchor, which generates account checks and a typed client.
Ask what your team already knows. A Solidity team moving to Solana is learning a new runtime, not a new syntax. Budget for that in weeks, not hours.
Wallets, payments, and one state vs many L2s
These two checks are about reach: where your users already are, and where their money sits.
Check 4: Wallet and payments reach
Ethereum has the widest wallet base, and smart accounts are now normal. ERC-4337 brings account abstraction without a protocol change.
EIP-7702 lets a normal account run code. Together they open fee sponsorship and session keys.
Solana's wallets are built around fast, cheap signing. Token features like transfer hooks and confidential transfers live in Token Extensions.
If you take payments, check which wallets and stablecoins your users hold today. Don't guess. Ask ten target users to show you their wallet, and write down what they use.
A smart account on an L2 and a Solana wallet both can hide gas from users. The work is in who funds it and how you stop abuse.
Check 5: L2 fragmentation vs single state
The layer 2 page on ethereum.org is open about this. It says no official Ethereum L2 exists, networks differ in design, and the ecosystem is fragmented.
So "build on Ethereum" in 2026 usually means "pick an L2". Each one has its own sequencer, bridge, and trust model, and L2BEAT rates them stage by stage.
Your liquidity, users, and indexers may end up split across several of them. Solana is one global state, where every app shares the same accounts and block order.
You give up the option to tune your own chain. In return, apps can call each other without bridges.
Bridges matter more than they look. Each one is extra code holding user funds, and an extra place for a deposit to get stuck. If your plan needs one, put it in your threat model, not a footnote.
Security and hiring: who keeps it running
Check 6: Audit and security maturity
The EVM has a longer audit history and deep tools for static analysis and fuzzing. The ethereum.org security guide lists the classic bugs, such as re-entry attacks and broken access control.
Solana's bug classes differ. Missing signer checks, missing owner checks, and swapped accounts top the list, because a program trusts whatever accounts the caller passes.
Anchor's constraints close many of these, but only if you write them. Pick an auditor with real history on the chain you choose.
Security also covers who can change the code after launch. On Solana, a program has an upgrade authority. On an Ethereum L2, check the L2's own upgrade keys as well as yours.
Check 7: Hiring
Solidity talent is easier to find, and many audited contracts exist to learn from. Rust engineers who know Solana's account rules are fewer.
Ask a plain question: who on your team can debug a failed transaction at 3am? If nobody can yet, budget time to learn the stack or bring in help.
Hiring also means the people around the code. You need someone who can run RPC, watch indexers, and read an explorer under pressure. That skill set is chain-specific, and it is the part founders forget to staff.
Use this sheet before a chain call. Fill it with numbers from your own tests.
# chain-decision.yaml - fill every field before you commit
product:
busiest_flow: "mint + list + trade in one session"
tx_per_user_per_day: 0 # measure from a prototype
fees:
who_pays: "user | app sponsors"
worst_day_fee_budget_usd: 0
finality:
ux_needs: "instant feedback | settled before payout"
measured_p95_confirm_ms: 0 # from your RPC, not a blog
state:
hot_accounts_or_contracts: [] # anything every user writes to
reach:
target_wallets: []
target_stablecoins: []
trust:
l2_or_l1: ""
sequencer_and_upgrade_risk: "" # from L2BEAT if on an L2
security:
audit_firm_with_chain_history: ""
team:
who_debugs_prod_at_3am: ""When Ethereum wins, and when Solana does
A chain your team can't run is the expensive chain. Use these signals to break a tie.
- Ethereum or one of its L2s fits when you already have audited Solidity code.
- Solana fits when your product changes state often and needs fast feedback on every action.
- Ethereum fits when EVM partners or user assets you must plug into live there.
- Solana fits when shared liquidity in one place matters more than a custom chain.
Our longevity research case study is a Solana example. The platform streams live experiment data and lets users predict, submit, and vote on compound "cocktails", with leaderboards on top.
If a build like this ran on Ethereum L1, each vote or submission would pay L1 gas. You would likely batch actions or move them to an L2. Neither is wrong, but each adds a design choice you have to own, and that cost belongs in the comparison.
For more chains, see which blockchain to build on in 2026. If an L2 is on your list, our launch comparison of Solana and Base covers sequencers and settlement.
FAQ
Is Solana cheaper than Ethereum in 2026?
Solana's base fee is a fixed 5,000 lamports per signature, per its fee docs, while Ethereum gas floats with demand. But fees are only one cost, and audits, RPC, indexing, and engineering time often matter more. Compare total cost to run, not a single fee.
Does Solana's new consensus change the decision?
It changes finality, not the rest of the checklist. The Solana upgrade page says the new consensus targets roughly 150 milliseconds to finality. Measure it on your own stack before you promise it to users.
Should I build on an Ethereum L2 instead of L1?
Usually yes, if you need low fees and fast feedback on the EVM. Check the L2's stage, sequencer, and exit window on L2BEAT first. Each L2 adds its own trust model on top of Ethereum.
Can I port Solidity contracts to Solana?
Not directly. Solana uses a different runtime, account model, and set of tools. Plan it as an architecture migration with a fresh audit.
How long does a chain decision take?
A focused team can settle it in a short sprint with a prototype of the busiest flow. The prototype gives you real fee, finality, and contention numbers. Skip it and you end up comparing blog posts.
Make the call with real numbers
Our Solana development service covers the program side once you've chosen. If you are still comparing, read Solana vs Polygon and our blockchain development cost guide. Try the YAML sheet on your busiest flow first.
Then book a Solana architecture call and bring the filled sheet. You get a reviewed fit assessment within one business day.
