The best Bitfinex lending bot in 2026 — an honest comparison
Most "best Bitfinex lending bot" pages are written by one of the bots — including this one. So here are the rules: every fee figure below cites the vendor’s own published terms with the date we verified it, the table includes the free options (Bitfinex’s native Auto-Renew + FRR, and open-source bots), and it says plainly where a competitor beats Stratum. Where a vendor does not publish a number, we say "not published" instead of guessing.
Fees and product facts verified May 30, 2026 against each vendor’s own site unless noted; page updated July 10, 2026. Nothing here is financial or tax advice. All Stratum return figures anywhere on this site are backtested/modeled, not realized performance, and depend on the rate regime.
Every option side by side
Bitfinex Auto-Renew + FRR (native)
Free — built into Bitfinex.
Zero cost, zero third-party risk. Auto-Renew re-offers returned funds automatically; the FRR option auto-fills the rate from an hourly weighted market average.
One rule, refreshed hourly. No order-book awareness, no maturity laddering, no earnings ledger or tax export. See our full Auto-Renew vs FRR explainer.
Stratum
Flat $9 / $29 / $99 per month by deployed-capital tier. No percentage of earnings. 14-day trial.
11 strategy algorithms with transparent backtests on historical Bitfinex data, paper mode, ledger-reconciled reporting, US TXF/Schedule-B and German tax exports, up to 3 API keys on Pro, 15–60s reprice cadence.
Bitfinex only. Newer than the incumbents — returns shown are backtested/modeled, not a live track record. Raw price loses to EarnUSD and Finvy Basic on small books.
Coinlend
5% performance fee on interest earned, plus a tiered weekly subscription (~$1–$3/week per a Cryptopolitan review; Coinlend’s live fee page was not machine-readable when verified May 30, 2026).
The 2017-founded incumbent (Coinlend GmbH, Mannheim). Multi-exchange: Bitfinex, KuCoin, DeFi. Long public track record and reviews.
The 5% cut scales with your earnings — on larger books it costs multiples of any flat fee. Strategy logic is a black box; no published backtesting or structured tax exports.
EarnUSD
Flat $3/month, 0% cut on gains; first month free (earn-usd.com, verified May 30, 2026).
Cheapest paid option, flat fee, Bitfinex specialist. If raw price on a small book is your only criterion, EarnUSD wins on that axis — full stop.
Thinner feature surface: no published transparent backtesting or strategy source, limited reporting/tax tooling compared to what we ship. Operated by JIAJI COMPANY LIMITED (Taiwan).
Cryptolend
Free tier ($0, 10-minute polling); Premium 3% on gains, no subscription (cryptolend.net/pricing, verified May 30, 2026).
A genuinely free tier. Pay-only-when-you-earn model on Premium.
Percentage cut on Premium scales with earnings; 10-minute polling on free; custody/API-scope language is not explicit on their pricing page.
ALTINVEST
Hybrid: $3–$45/month minimum by tier plus a 3% service fee on excess earnings (altinvest.finance blog, Apr 4, 2025).
Prolific educational content; tiered model can be cheap at small size.
Percentage component scales with earnings like Coinlend’s; strategy internals not published.
Finvy
Flat annual tiers from ~$89/yr (Basic, $20k cap) to ~$2,699/yr (VVIP); no percentage cut; 7-day trial (finvy.ai, verified May 30, 2026).
Flat-fee model with explicit non-custodial wording; claims SOC 2 certification, which Stratum does not claim.
Per-tier lending caps; newer, low public footprint. Backtesting transparency not comparable to a published, replayable engine.
FULY.AI
Subscription; exact pricing not published on the site — requires signup (fuly.ai, verified May 30, 2026).
Operating since 2019; 7-day trial; annual plan discount.
Undisclosed pricing makes cost comparison impossible; payment reportedly via USDT transfer with manual activation.
DIY / open-source bots (GitHub)
Free (your time, your server).
Full control, zero fees, code you can read. The right choice if you enjoy running infrastructure.
You own uptime, key security, error handling, rate-limit etiquette, and there is no earnings ledger or tax export. Our free-bots page compares the trade-offs honestly.
There is no single "best" — it depends on your book size and what you need
Under roughly $10k deployed: use the free native Auto-Renew + FRR, or EarnUSD at $3/mo if you want a bot. At that size every percentage fee is small in dollars and Stratum’s $9/mo is hard to justify on fees alone — paper mode and backtests are the only reason to pick us this early.
From roughly $25k: percentage fees start to bite (a 5% cut on a $25k book at a modeled 10% APR is ~$125/yr and grows with your earnings, while flat fees don’t). Flat-fee tools — Stratum, EarnUSD, Finvy — pull ahead; between those three, the differentiators are transparent backtesting, paper mode, ledger-reconciled reporting, and tax exports.
From $100k up: the fee gap vs percentage models is large (a 5% cut of ~$10k/yr modeled interest is ~$500/yr vs $348/yr for Stratum Pro), and operational features dominate: multi-account, reprice cadence, audit-grade reporting, and exports your accountant can file.
How this comparison was made
Fee figures come from each vendor’s own published pricing, captured May 30, 2026; where a vendor’s live pricing page could not be read directly (Coinlend’s is JS-rendered), we cite the best available third-party review and label it as such. Two smaller tools (REYIELD, Lendingify) were excluded because we could not verify them as actively operating. We ship one of the products in this table — treat our "Strengths" column with the same skepticism you’d apply to any vendor, and check the sources.
Frequently asked questions
Is there a completely free Bitfinex lending bot?
Yes, two kinds. Bitfinex’s own Auto-Renew + FRR is free, built in, and keeps capital continuously lent at an hourly-average rate. Open-source GitHub bots are also free if you run them yourself. Paid bots exist to add what those lack: book-aware repricing, strategy logic, reporting, and tax exports.
Which Bitfinex lending bot is cheapest?
Not Stratum. EarnUSD ($3/mo flat) is the cheapest paid bot, and Finvy Basic (~$89/yr) also undercuts Stratum’s $9/mo entry tier. Percentage-fee tools (Coinlend 5%, Cryptolend 3%, ALTINVEST hybrid) can be cheaper than any flat fee on very small books and more expensive on large ones — the crossover math is on our Coinlend comparison page.
Do any of these bots hold my funds?
No. Every tool in this table, Stratum included, is non-custodial: funds stay in your own Bitfinex account and the bot connects through an API key without withdrawal permission. Anyone marketing custody as their unique safety feature is describing the whole category.
Do lending bots actually beat the free FRR option?
Sometimes, and nobody can honestly guarantee it. FRR is an hourly weighted average, so it lags fast rate moves in both directions; a bot can reprice in seconds and hold out for spikes. Stratum publishes backtests of each strategy against historical data — modeled results, clearly labeled, never a promised return. Be skeptical of any vendor quoting "bots earn X% vs FRR’s Y%" as fact.
When is Stratum the right choice?
When you want to verify strategy behavior before risking capital (backtests + paper mode), need reporting that reconciles to the Bitfinex funding ledger, want US TXF/Schedule-B or German tax exports, or run multiple accounts. If none of those matter to you, a cheaper tool or the free native option is the rational pick — we’d rather say that here than have you churn in a month.
Can I switch bots without moving funds?
Yes. Since every tool is API-key based and your funds never leave Bitfinex, switching is: revoke the old bot’s API key, create a new key (withdrawals disabled), connect the new tool. Open loans keep running on Bitfinex regardless of which bot placed them.
See if Stratum earns its fee before you pay it
Run the backtests on three years of Bitfinex funding data, then paper-trade a strategy with zero capital at risk. If the numbers don’t convince you, the free native option is one click away — no hard feelings.