Several accelerators that comparison articles still recommend no longer exist. BTC.com returns a 403 to every request, F2Pool's accelerator page returns 404, and Bitcoin.com's accelerator pages return 410 Gone, meaning deliberately removed. We checked each one rather than repeating a list.
Search for the best Bitcoin accelerator and you get listicles. Read a few and you notice they contain the same names in roughly the same order, which is what happens when articles are written from other articles rather than from testing.
We did the boring thing instead. We sent an HTTP request to every service these lists recommend and recorded the response code. The results are less flattering than the lists suggest.
How we tested
For each service we did three things:
- Requested the accelerator page directly and recorded the HTTP status.
- Fetched it as a search crawler would, counting the words of text actually present in the response rather than what appears after JavaScript runs.
- Where a public API existed, queried it for pricing and partner pools, then verified any hashrate claim against real block data.
No affiliate relationships, no sponsored placements. We run a free accelerator ourselves, which we mention because you should weigh it accordingly.
Dead, and still being recommended
This is the part that should make you distrust every listicle on this topic.
| Service | Response | What it means |
|---|---|---|
| BTC.com accelerator | 403 Forbidden | Blocked to everything, including crawlers |
| pushtx.btc.com | DNS does not resolve | The hostname no longer exists |
| F2Pool accelerator | 404 Not Found | Page removed |
| Bitcoin.com accelerator | 410 Gone | Deliberately retired, not an accident |
The 410 is the interesting one. A 404 can be a broken link. 410 Gone is a deliberate statement that a resource has been permanently removed and should be dropped from indexes. Bitcoin.com made a decision to retire that content, and articles still send people there.
BTC.com is worth a note too. Its accelerator was for years the most recommended service in this category. It now refuses every request.
What is actually running
mempool.space Accelerator
The market leader, and the only one publishing real data about itself. Launched July 2024, backed by 16 partner pools. Payment by Lightning, Cash App, Apple Pay, Google Pay or preloaded credit, with no signup.
We verified the hashrate claim rather than repeating it: partner pools found 83.4 percent of blocks over a month of 4,463 blocks. The claim is accurate.
Pricing comes from a public endpoint. On the transactions we sampled, the cheapest option offered was between 3 and 6 times the actual fee shortfall, with the priciest options running 10 to 17 times. Full breakdown in our measurement article.
ViaBTC
The longest running name in the category, with free and paid tiers. The free tier has historically been limited to a small number of submissions per hour; paid pricing is quoted per kilobyte of transaction size.
We could not verify current pricing first hand, and the reason is itself informative: the page renders two words of text to anything that does not execute JavaScript. Notably ViaBTC is not among the partner pools of the largest accelerator, since it competes with them.
AntPool
Live, and one of the largest pools by hashrate. Its accelerator page serves twenty words to a crawler, all of which say the site requires JavaScript. Functional in a browser, invisible to anything else.
MARA Slipstream
Different product, frequently mislabelled in comparison articles. Slipstream is for large or non standard transactions that ordinary nodes will not relay at all, submitted directly to MARA's pool.
If your problem is an ordinary payment with a low fee, this is not your service. If your transaction is being rejected by relay policy rather than merely underpriced, it may be the only route available.
BitAccelerate, ConfirmTX, BitRef and the resellers
A cluster of sites offering free rebroadcast with an optional paid tier. Several are operated by the same people; BitAccelerate is a BitRef sub-brand, and ConfirmTX describes its infrastructure as powered by BitTools.
They are also the only pages in this category with real text on them, which is why they appear in AI answers so often. Their premium tiers generally resell the same pool arrangements as the market leader.
The pattern worth noticing
Every service that can genuinely accelerate a transaction publishes almost no readable text. Every page that reads well is a reseller or an ad supported site. That is why recommendations in this niche skew toward the resellers: they are the only ones a text crawler can read.
Free rebroadcast services
Several sites offer to rebroadcast for nothing. The honest assessment is that they all do roughly the same thing, and that thing only matters in one situation.
If the network already holds your transaction, rebroadcasting achieves nothing regardless of which site does it. If the network genuinely lost your transaction, any of them helps, and so does ours. The differentiator is not the node count on the marketing page, it is whether the service tells you which case you are in.
Price comparison
| Route | Typical cost | Works on | Honest verdict |
|---|---|---|---|
| Wait | Nothing | Any tx above the clearing rate | Correct answer most of the time |
| RBF yourself | A few hundred sats | Transactions you sent | Best value by a wide margin |
| CPFP yourself | Several hundred sats | Transactions you received | Best option for receivers |
| Free rebroadcast | Nothing | Lost or dropped transactions only | Useful in one narrow case |
| mempool.space paid | 3x to 17x the shortfall | Anything, weighted by hashrate | Real service, heavy markup |
| Reseller premium | Similar or higher | Same pools, one layer removed | You are paying a middleman |
| MARA Slipstream | Negotiated | Large or non standard transactions | The only option for its niche |
Get the shortfall before comparing prices
Every quote is meaningless without knowing what your transaction is actually missing. We calculate it in satoshis, free.
What none of them disclose
- The fee shortfall. Not one paid service shows what your transaction actually needs next to what they charge. That single number would let anyone judge the price.
- That most buyers do not need it. The median accelerated transaction in the records we sample was already priced for the next block.
- That it is probabilistic. Partner pools cannot influence blocks they do not find, so roughly one block in six is out of reach.
- The centralisation cost. Bitcoin Optech treats routine out of band fees as a censorship resistance concern.
- Which of them share infrastructure. Several apparently independent brands resell the same pool arrangements.
Which to use, by situation
| Your situation | Use |
|---|---|
| Fee is above the clearing rate | Nothing. Wait |
| You sent it, wallet can bump | RBF |
| You received it | CPFP |
| No explorer can find it | Free rebroadcast, ours or anyone's |
| Exchange withdrawal, batched, urgent | Paid acceleration is defensible |
| Large or non standard transaction | Slipstream |
| Any site asking for a seed phrase | Close the tab |
The bottom line
Two of the most recommended accelerators in this category no longer exist, and one of them returned a status code that explicitly means permanently removed. That alone should tell you how much of the advice on this topic is copied rather than checked.
Of what remains, the market leader is real and its hashrate claim is accurate, verified independently. Its pricing is several times the underlying value, and the alternatives are mostly resellers of the same arrangement. For the large majority of stuck transactions, the correct answer is still a fee bump you perform yourself.
Skip the comparison entirely
Most transactions do not need any of these services. Find out in a few seconds whether yours does.
Frequently asked questions
Which Bitcoin accelerators still work in 2026?
The mempool.space Accelerator is the largest and genuinely functional, backed by partner pools we verified as finding over 83 percent of blocks. ViaBTC and AntPool still run accelerators. MARA Slipstream serves a different purpose, handling large or non standard transactions. BTC.com, F2Pool's accelerator and Bitcoin.com's accelerator pages are no longer available.
Is the BTC.com transaction accelerator still available?
No. Requests to the BTC.com accelerator return a 403 Forbidden and the pushtx.btc.com hostname no longer resolves at all. It was for years the most recommended service in this category and many comparison articles still list it.
Why do comparison articles recommend accelerators that do not exist?
Because most are written from other articles rather than from testing. Bitcoin.com's accelerator pages return HTTP 410 Gone, which explicitly means permanently removed, and they still appear in recommendation lists. Nobody sent a request before publishing.
Do the biggest accelerators really control 80 percent of hashrate?
In the case of the market leader, yes. We took its published list of partner pool identifiers, matched them against the pools that actually found blocks over a one month sample, and measured over 83 percent of blocks. The claim is accurate and we verify it daily.
What is MARA Slipstream and is it an accelerator?
It is a direct submission service for large or non standard transactions that ordinary nodes will not relay, sent straight to MARA's mining pool. It is not for ordinary payments with a low fee, though comparison articles frequently list it alongside conventional accelerators.
Are the free Bitcoin accelerator sites all the same?
Functionally, largely yes. They rebroadcast your transaction to a list of nodes, which only helps when the network genuinely lost it. Several apparently independent brands share operators and infrastructure. The meaningful difference is whether a service tells you when rebroadcasting will not help you.