An AI coding assistant needs somewhere to run the code it writes. For a small automation, that might mean an isolated place to process a file and return a result. For a product, it might mean a development workspace that survives between sessions.
Those are different jobs. Buying the cheapest compute hour does not necessarily buy the best environment for either one.
This comparison adapts our November 14, 2026 research for builders choosing their next infrastructure experiment. Official sources were checked again on November 15. It is a pricing and capability review, not a performance benchmark. All amounts are USD; confirm the applicable plan before purchasing.
The short version
Our recommendation is to shortlist by workflow, then test a representative task:
- E2B: consider it for agent code-execution workflows, especially if its session and concurrency limits match your needs.
- Daytona: consider it when usage-based provisioning and hardware choices matter. Check whether you are pricing interruptible or on-demand capacity.
- Freestyle: consider it for recurring experiments where monthly allowances and a usage-credit subscription are attractive.
- CodeSandbox: consider it for resumable development environments and agent workspaces. Verify current pricing directly before budgeting.
These are editorial starting points, not a claim that one provider is universally faster, safer, or cheaper.
What the pricing actually means
E2B: distinguish the subscription from usage
E2B’s Hobby plan has a $100 one-time usage credit. Its Pro plan is $150 per month plus usage. The published rates imply $0.1656 per running hour for 2 vCPUs and 4 GiB RAM:
(2 × $0.000014 + 4 × $0.0000045) × 3,600 = $0.1656
At 100 hours, that is $16.56 of compute. On Pro, the base fee makes the illustrative total $166.56, before other applicable charges. Hobby lists one-hour sessions and 10 concurrent sandboxes; Pro lists 24-hour sessions and 100 concurrent sandboxes, with paid expansion options. Do not assume you need Pro solely to try a workload. E2B pricing
Daytona: compare the same capacity class
Daytona advertises usage-based pricing and $200 in initial credits. During our check, its pricing page displayed preemptible rates: $0.0706 per lowest-tier compute-core hour and $0.0113 per GiB-hour. It says preemptible cores and memory are 30% cheaper and may be reclaimed.
For one such core and 4 GiB, the displayed rates total approximately $0.1158/hour. That is not an interchangeable replacement for the original report’s approximately $0.1658 on-demand estimate. A core equals two vCPUs only where SMT is available and enabled; hardware, region, operating system, and billing mode change the comparison. Stateful volumes are billed separately. Daytona pricing
Freestyle: recurring allowances, then a usage minimum
Freestyle lists $0.04032 per vCPU-hour and $0.0129 per GiB-hour, giving a $0.13224/hour 2-vCPU/4-GiB compute reference rate before allowances. Monthly compute allowances are 200 vCPU-hours and 400 GiB-hours. Its $50 Hobby and $500 Pro monthly fees cover usage dollar for dollar rather than being added on top of it; Free stops at its allowances instead of charging overage. Freestyle pricing
Important discrepancy: the pricing page marks Free persistence and custom sizing unavailable, while the documentation describes persistent Free VMs and smaller sizes. Verify the feature you need in your account before relying on it. The documentation also distinguishes allocated resources from actual CPU activity, and says paused VMs retain storage costs. Freestyle pricing and limits
CodeSandbox: useful workspace capabilities, pricing needs confirmation
CodeSandbox’s official site describes isolated environments, snapshots, cloning, and configurable hibernation. That makes it a candidate when users need to return to a project, not just execute a snippet. Its restoration-speed statements are vendor claims, not measurements from this review. CodeSandbox
The November 14 source report recorded free Build, Scale from $170/month with 160 included VM-hours, and an approximately $0.15/hour 2-vCPU/4-GiB reference rate. We could not independently revalidate those prices in this update: the official pricing page denied automated access. Treat them as dated research notes, not a current quote or basis for a lowest-cost ranking. Check CodeSandbox pricing
Compare a workload, not four headline numbers
Use the same project and record:
- Job shape: short script, build-and-test loop, or interactive workspace.
- Actual runtime: include dependency installation, retries, and idle time before shutdown.
- Persistence: what survives a stop, pause, expiration, or interrupted job?
- Full bill: subscription or minimum spend, runtime, retained storage, network transfer, and extra capacity.
- Limits: concurrent jobs, session duration, memory, disk, and region availability.
- Controls: secrets, network access, isolation, cleanup, and observability.
Run a normal task, a failed task, and a stop/resume test. Record the result and billed usage. Only then estimate the monthly cost at your expected volume.
A sandbox is not permission to give generated code unrestricted credentials or production access. Keep test data separate, scope credentials narrowly, and define cleanup and spending limits.
Update note: This edition clarifies Daytona’s preemptible-versus-on-demand comparison, flags conflicting Freestyle Free-plan documentation, and marks CodeSandbox pricing as unverified in this source check. Prices and plan features can change.