The best accelerator for most stuck transactions is not an accelerator: a fee bump from your own wallet, RBF if you sent it, CPFP if you received it. Among services, the best paid accelerator is the mempool.space Accelerator, the only one with named pools, verified reach of about 82 percent of blocks and a public record. The best free one is any relay that shows you every node's answer, because a free push only helps a transaction the network does not already hold. ViaBTC is a real but single pool option with no refunds. ConfirmTX, BTC.com, F2Pool's and several others are dead, and the 360 Bitcoin Accelerator's free tool is switched off.
Every page that ranks for this question is a list of seven to ten names with a paragraph each, most of it copied from the services' own pages, and several of the names are dead. So this page does the opposite. The answer comes first, ranked. The tests come second. The evidence, checked on the live sites on 10 October 2026, comes last, so you can disagree with the ranking and still use the data.
The ranked answer
| # | Best for | Pick | Why |
|---|---|---|---|
| 1 | Almost everyone | A fee bump: RBF if you sent it, CPFP if you received it | Costs only the shortfall, usually about a hundred sats; reaches every pool at once; no account, no refund policy needed |
| 2 | Best paid accelerator | mempool.space Accelerator | Fifteen named pools, 81.8% of blocks verified from block data, every job public, price computed live |
| 3 | Best free accelerator | A multi node relay that shows each answer | Free pushes only help a transaction nobody holds; the honest ones tell you when that is not your case |
| 4 | Pool direct | ViaBTC paid service | Genuine pool, but one pool at 9.4% of blocks, price shown only after sign in, no refunds |
| 5 | Reseller with terms | BitAccelerate paid | Clearest refund policy in the category, but pools unnamed and no price before you paste |
| Avoid | ConfirmTX, 360 Bitcoin Accelerator, BTC.com, bitcoin-accelerator.com, every flat fee resend | Down, switched off, dead, parked, or selling a resend that cannot work |
If that table is all you needed, the free checker will tell you in a few seconds which row you are in. The rest of this page is the reasoning.
The five tests
We scored every service on the same five questions. They are the questions a careful person would ask before paying a stranger to talk to a miner on their behalf.
- Is the reach verifiable? Which pools, named, and what share of recent blocks did those pools find? We recompute shares from block data, never from the service's own claim.
- Is the price shown before you commit? Before an account, before a deposit, before a paste if possible.
- What happens when it fails? A written refund policy, or the words non refundable, or silence.
- Is there a public record? Can anyone see what the service did last week, or only what it says it did since launch?
- Is it alive today? Not in a 2023 listicle. Today. We opened every one.
| Service | Reach verified | Price before paying | Refund | Public record | Alive |
|---|---|---|---|---|---|
| Fee bump (RBF or CPFP) | Every pool | Yes, it is the shortfall | Not needed | The chain itself | Always |
| mempool.space Accelerator | 15 pools, 81.8% | Yes, rounded up to fixed options | None once requested | Every job published | Yes |
| ViaBTC paid | One pool, 9.4% | Only after sign in | Non refundable | A lifetime counter | Yes |
| BitAccelerate paid | "Over 80%", pools unnamed | After you paste a txid | 24 hour policy | None | Yes |
| Free relays (ours, BitAccelerate free, BTC TX Accelerator) | Not applicable, no pool | Free | Not needed | Ours shows every node answer | Yes |
| 360 Bitcoin Accelerator | "Partners", unnamed | $25 flat | Not mentioned | None | Paid only; free tool offline |
| ConfirmTX | Unknown | Unknown | Unknown | None | HTTP 522 all day |
| BTC.com accelerator | Returns 403 Forbidden to every request | No | |||
| Poolin, F2Pool accelerators | 404; F2Pool runs no accelerator page | No | |||
| bitcoin-accelerator.com | A parked page with a privacy notice and nothing else | No | |||
| Bitcoin Afterburner, speedupbitcoin, btcaccelerator.io, fastbtc.org | Do not resolve or do not answer | No | |||
Why a fee bump beats every accelerator
An accelerator pays a pool, or a set of pools, to treat your transaction as higher fee than it is. A fee bump makes it actually higher fee, which every pool on the network notices at once, with no third party, no account, and no refund policy to read, because nothing can fail. On the day this was written the next block was clearing down to 0.26 sat/vB and the median inside it was 1 sat/vB. A typical stuck transaction, 140 virtual bytes at 0.15 sat/vB, needed about 119 extra sats to reach that median. Ten cents. The cheapest purchasable option at the best paid accelerator that morning was 7,000 sats.
The sender bumps with Replace By Fee, supported by Electrum, Sparrow, Bitcoin Core, BlueWallet, Trezor Suite and Ledger Live. The receiver bumps with Child Pays For Parent by spending the incoming output with a high fee. The only people who cannot bump are those on the receiving end of an exchange withdrawal with no spendable output yet, and they are the entire legitimate market for paid acceleration.
See the shortfall before you see a quote
We read your effective fee rate against the live next block floor and show what a bump costs in sats. Then any accelerator quote has something to be compared with.
Why mempool.space is the best paid option
Because it is the only one we can measure. Its partner pools are listed by ID on every acceleration in its public feed, and matching those IDs against thirty days of block data gives Foundry USA, AntPool, F2Pool, SpiderPool, MARA, Luxor, Braiins, Binance Pool, BTC.com and six smaller pools, together 81.8 percent of 4,414 blocks. Its estimate endpoint is public, so we priced a real transaction: 1,469 sats calculated, 7,000 offered. Its last thirty days of jobs are public too: fifteen accelerations, all completed, median sixteen minutes to confirmation. We wrote up the whole measurement separately.
Its faults are real. The purchase options round the computed cost up several times over, nothing is refundable once requested, and its own record shows that 80 percent of recent buyers were already paying next block rates when they paid. Best paid accelerator is not the same as a good idea for you.
Why the free ranking is really about honesty
A free accelerator rebroadcasts a transaction. That helps in exactly two cases: the transaction never reached the network, or it was dropped after fourteen days. In every other case the network already holds it and a rebroadcast changes nothing, which is why we rank free services by whether they tell you so. Our relay pushes to twenty named nodes and shows each node's answer, so when nineteen of them say already held you know the push was not your fix. BitAccelerate's free tier pushes to twenty nodes as well and says plainly on its page that the impact may be minimal in a congested network. BTC TX Accelerator rebroadcasts to public and private nodes with no feedback. A wall of green badges with no detail is the sign of a free tool that is selling you the paid one next to it.
The ones to avoid, with the reason each
- ConfirmTX. Returned HTTP 522, Cloudflare's code for an origin server that does not answer, on four checks across 10 October 2026. Its Trustpilot page carries a notice that the company's website has closed and three one star reviews about payments with no result. Our review has the detail.
- 360 Bitcoin Accelerator. The free tool every listicle describes shows an offline notice; what remains is a $25 resend every fifteen minutes through unnamed partners, which cannot do anything for a propagated transaction. Checked line by line.
- BTC.com accelerator. 403 Forbidden to every request, and the old pushtx.btc.com hostname no longer resolves.
- bitcoin-accelerator.com. Renders a single privacy opt out line. A parked domain trading on the search term.
- Any flat price resend. $5, $25 or $99 for repeating a rebroadcast is paying for the thing that does nothing. A pool accelerator at least pays a miner.
How to choose in thirty seconds
- Is it confirmed? Look it up. A surprising number are. Done.
- Is it found at all? If no explorer has it, push the raw hex, free. Done.
- Is the fee at or above the next block floor? Then wait; blocks are random and forty quiet minutes is normal. Done.
- Can you bump it? Sender: RBF. Receiver with an output: CPFP. Done, for about a hundred sats.
- Nobody can bump and it cannot wait fourteen days? Now, and only now, compare the mempool.space quote against the wait, read the no refund rule, and decide.
The bottom line
The best Bitcoin transaction accelerator in 2026 is the bump button in your own wallet. The best paid one is the mempool.space Accelerator, for the narrow case where no bump is possible, with its reach verified and its rounding and no refund rule understood. The best free one is whichever tells you the truth about whether a push can help you at all. And the names still topping the listicles are, in several cases, servers that no longer answer.
Row one, two, three or four?
Paste the transaction ID. Twenty nodes answer, the diagnosis names your case, and the verdict says whether anyone should be paid.
Frequently asked questions
What is the best Bitcoin transaction accelerator?
For most stuck transactions the best accelerator is a fee bump from your own wallet: RBF if you sent it, CPFP if you received it. It costs only the shortfall and reaches every mining pool at once. Among paid services, the mempool.space Accelerator is the best, with fifteen named partner pools that found 81.8 percent of blocks in the thirty days to 10 October 2026 and a public record of every job.
What is the best free Bitcoin accelerator?
A free accelerator rebroadcasts a transaction, which only helps when the network does not already hold it. The best free one is therefore whichever shows you each node's answer, so you can see whether the push did anything. The relay on this site pushes to twenty named nodes and reports every reply; BitAccelerate's free tier also pushes to twenty nodes.
Is ViaBTC the best Bitcoin accelerator?
It is a genuine service run by a real pool, which puts it ahead of most of the category, but it only prioritises transactions in blocks ViaBTC itself mines, 9.4 percent of blocks in the month to 10 October 2026, shows its price only after you create an account, and is non refundable. The mempool.space Accelerator reaches about nine times as many blocks.
Which Bitcoin accelerators are dead in 2026?
On 10 October 2026 ConfirmTX returned HTTP 522 on every check, BTC.com's accelerator returned 403 Forbidden, Poolin's returned 404, F2Pool has no accelerator page, bitcoin-accelerator.com is a parked page, and Bitcoin Afterburner, speedupbitcoin.com, btcaccelerator.io and fastbtc.org do not answer. The 360 Bitcoin Accelerator's free tool shows an offline notice.
How much does a Bitcoin accelerator cost compared with a fee bump?
On 10 October 2026 a typical stuck transaction, 140 virtual bytes at 0.15 sat/vB, needed about 119 extra sats to reach the next block median, roughly ten cents. The cheapest purchasable option at the mempool.space Accelerator that morning was 7,000 sats, and flat price services charged $5 to $25 for a resend that cannot help a propagated transaction.
When should I pay for a Bitcoin accelerator?
Only when nobody in the transaction can bump the fee, typically an exchange withdrawal you received with no spendable output yet, and the payment cannot wait the fourteen days after which nodes drop it. Then use a service whose pools are named and whose reach you can check, and read its refund terms first.
Do Bitcoin accelerators guarantee confirmation?
No service can guarantee a block. A pool accelerator can only promise that when a partner pool finds a block, your transaction is in it. With partners finding about 82 percent of blocks that usually means one or two blocks; with a single pool at 9.4 percent it averages about ten. Any site promising a fixed confirmation time is making a promise it cannot keep.