8 Best Modal Alternatives (2026)
The closest alternatives to Modal are ascii, Blaxel, box and Cloudflare Sandbox, with 4 more below. Each shares a comparison category with it, so every rationale here names both tools' real values.
Why do people look for Modal alternatives?
- Most people searching for Modal alternatives are not shopping, they already run it and something has stopped fitting.
- That something is usually a specific number rather than a feeling.
- This page starts from the fields where Modal genuinely trails the rosters it appears in, and only then covers the reasons that never show up in a table.
The measured reasons.
- There aren't any in our data.
- Modal is not bottom of its roster on a single field we score, across 25 filled fields.
- That is worth stating plainly, because most alternatives pages exist to imply a problem that isn't there.
- If it is working for you, the honest advice is to stay.
The reasons that never make it into a table.
- A price rise after a funding round.
- A licence change that turns a self-host into a subscription.
- A region you now need and they do not have.
- An acquisition.
- A support experience that quietly degrades.
- None of those are fields, and all of them move teams, which is why every entry below links back to Sandbox providers, where the full field set and its sources live.
- The ones we catch get logged on the Modal timeline.
How the shortlist is ordered.
- Every tool below shares at least one comparison category with Modal, sorted by how many categories the two overlap in.
- There is no editorial ranking, no sponsorship and no affiliate link, the order is the overlap count.
- The rationale under each is generated from the two tools' own cells, so it names real values rather than adjectives.
1.
ascii
- ascii, Agent orchestration over Telegram, running on box's VM infrastructure.
- It meets Modal in Sandbox providers.
- Against that: Meter (subscription, where Modal records per-second) and Custom images (Partial, where Modal records Yes).
- Best for you want an agent you message rather than an API you call.
- An agent harness with a VM attached, judged from an unverified vendor table with no fundamentals established.
Where ascii and Modal actually differ
ascii profileCompare in Sandbox providers2.
Blaxel
- Blaxel, Agent-first cloud claiming ~25 ms microVM boots from snapshots.
- It meets Modal in Sandbox providers.
- It is ahead on Snapshot & fork (Yes against Partial), Sydney region (Partial against No) and MCP server (Yes against Partial).
- What you give up: Egress control (open, where Modal records proxy-logged) and Persistent FS (Partial, where Modal records Yes).
- Best for you want sandboxes, agent hosting and MCP from one vendor.
- The 25 ms claim measures the wrong operation, and the broad platform is a lot to buy from a seed-stage company.
Where Blaxel and Modal actually differ
Blaxel profileCompare in Sandbox providers- Egress control
- openModal: proxy-logged Inferred
- Sydney region
- PartialModal: No Inferred
- Persistent FS
- PartialModal: Yes Inferred
- MCP server
- YesModal: Partial Inferred
- Funding
- seedModal: series-b Community-reported
3.
box
- box, Persistent Linux VMs with SSH, per-VM IPv4 and disk-level forking, priced flat.
- It meets Modal in Sandbox providers.
- Against that: Meter (subscription, where Modal records per-second) and Custom images (Partial, where Modal records Yes).
- Best for you want a VM that stays up rather than a sandbox that vanishes.
- A coherent long-lived-VM pitch, but a vendor self-assessment with no measured isolation, boot time or price.
Where box and Modal actually differ
box profileCompare in Sandbox providers4.
Cloudflare Sandbox
- Cloudflare Sandbox, Container sandboxes driven from a Worker, addressed through Durable Objects.
- It meets Modal in Sandbox providers.
- It is ahead on Egress control (allowlist against proxy-logged), Sydney region (Partial against No) and Idle cost (free-when-stopped against active-cpu-only).
- What you give up: Persistent FS (No, where Modal records Yes) and Max runtime (60 min, where Modal records 1440 min).
- Best for your app already runs on Workers and Durable Objects.
- An addressable sandbox object in your app, worth it on Workers but too slow to migrate to.
Where Cloudflare Sandbox and Modal actually differ
Cloudflare Sandbox profileCompare in Sandbox providers- Persistent FS
- NoModal: Yes Inferred
- Max runtime
- 60minModal: 1440 min Inferred
- GPU
- NoModal: Yes Inferred
- Snapshot & fork
- NoModal: Partial Inferred
- Runtimes
- any-oci-imageModal: python, javascript-typescript, bash, any-oci-image Inferred
5.
CodeSandbox SDK
- CodeSandbox SDK, Firecracker VMs with memory snapshots, from the online IDE, now owned by Together AI
. - It meets Modal in Sandbox providers.
- It is ahead on Snapshot & fork (Yes against Partial) and Isolation (microvm against gvisor).
- What you give up: GPU (No, where Modal records Yes) and MCP server (No, where Modal records Partial).
- Best for you fork one prepared environment many times.
- The best-engineered snapshot-and-fork here for branching workloads, now a component of Together AI rather than its own product.
Where CodeSandbox SDK and Modal actually differ
CodeSandbox SDK profileCompare in Sandbox providers- GPU
- NoModal: Yes Inferred
- MCP server
- NoModal: Partial Inferred
- Egress control
- openModal: proxy-logged Inferred
- Cold start
- 1.2sModal: 1.5 s Inferred
6.
Daytona
- Daytona, Sub-second container sandboxes for agent workloads, from a team that built a dev-env manager.
- It meets Modal in Sandbox providers.
- It is ahead on Egress control (allowlist against proxy-logged), Snapshot & fork (Yes against Partial) and MCP server (Yes against Partial).
- What you give up: Isolation (container, where Modal records gvisor) and Funding (seed, where Modal records series-b).
- Best for boot time is your headline metric and the code is your own.
- E2B
's most credible ergonomics challenger with the best MCP story, but shared-kernel containers make it wrong for untrusted code.
Where Daytona and Modal actually differ
Daytona profileCompare in Sandbox providers- Funding
- seedModal: series-b Community-reported
- SDKs
- pythontypescript+1Modal: python, cli Inferred
7.
Self-hosted Firecracker
- Self-hosted Firecracker, The baseline: Firecracker on your own metal, plus every hard part you now own.
- It meets Modal in Sandbox providers.
- It is ahead on Concurrent limit (1,000 sandboxes against 100 sandboxes), Sydney region (Yes against No) and Egress control (allowlist against proxy-logged).
- What you give up: Streaming output (No, where Modal records Yes) and Preview URLs (No, where Modal records Yes).
- Best for sustained volume where vendor margin exceeds an engineer's salary.
- The honest baseline: identical isolation at a tenth the cost, minus the two engineer-years of orchestration.
- Note that we carry Self-hosted Firecracker as the do-it-yourself baseline in that roster, the "what if we just ran this ourselves" reference point.
- The honest answer is usually that it is cheaper and considerably more work.
Where Self-hosted Firecracker and Modal actually differ
Self-hosted Firecracker profileCompare in Sandbox providers- Streaming output
- NoModal: Yes Inferred
- Preview URLs
- NoModal: Yes Inferred
- File up/download
- NoModal: Yes Inferred
- Concurrent limit
- 1,000sandboxesModal: 100 sandboxes Inferred
- Idle cost
- full-rateModal: active-cpu-only Inferred
- Sydney region
- YesModal: No Inferred
8.E2B
- E2B, Open-source Firecracker sandboxes with Python and TypeScript SDKs for AI agents.
- It meets Modal in Sandbox providers.
- It is ahead on Browser inside (Yes against Partial), Isolation (microvm against gvisor) and SDKs (python, typescript, cli against python, cli).
- What you give up: GPU (No, where Modal records Yes) and Egress control (open, where Modal records proxy-logged).
- Best for you want the category default with a real self-host escape hatch.
- The safest default: complete SDKs, Dockerfile templates and an Apache licence, though no longer fastest and weak at hobby scale.
Where E2B and Modal actually differ
E2B profileE2B vs ModalCompare in Sandbox providers- GPU
- NoModal: Yes Inferred
- Egress control
- openModal: proxy-logged Inferred
- Persistent FS
- PartialModal: Yes Inferred
- SDKs
- pythontypescript+1Modal: python, cli Inferred
How this list was built
There is no editorial ranking on this page and no sponsorship behind it. The order is mechanical: every tool that shares a comparison category with Modal, sorted by how many categories the two overlap in. A tool that meets Modal in three rosters sits above one that meets it in a single roster, because more overlap means the comparison is more like-for-like.
The rationale under each entry is composed from the two tools' own cells. Where they differ on a field we score, the sentence names both values and the unit. Where they don't differ, it says so instead of manufacturing a distinction, which is why some entries are short.
Values, sources and verification dates all live on the category tables: Sandbox providers. If a figure here disagrees with a vendor's current pricing page, the vendor is right and we are stale.
Still deciding whether to move at all? The Modal profile has the when-to-use and when-not-to-use blocks, and the Modal timeline has the dated changes that usually trigger a migration.