| Network / Metric | Energy per Operation | Annual Consumption |
|---|---|---|
| Bitcoin (blockchain-wide) | — | ≈ 87 TWh/year Crypto.com |
| Bitcoin (per transaction) | ≈ 707.6 kWh/tx Wikipedia | — |
| Ethereum (per transaction) | ≈ 62.56 kWh/tx Wikipedia | — |
| OTR PoW (per message proof) | ≈ 0.00014 Wh (≈ 0.00000014 kWh)* | — |
| OTR Network<br/>(1 M msgs/day) | — | ≈ 0.18 MWh/year (≈ 0.00018 GWh/year)** |
* Assumes a typical mobile CPU drawing 2 W for ~0.25 s to complete the hash puzzle.
** 0.00014 Wh/proof × 1 000 000 proofs/day × 365 days ≈ 51 kWh/year; even at 5 W CPU load it’s < 200 kWh/year.
Key Takeaways
- Negligible per-proof cost
- At ~0.00014 Wh (0.14 mWh) per proof, an OTR proof uses about enough energy to power a 10 W LED for 0.014 seconds.
- Network-wide footprint is tiny
- Even if you send 1 million proofs every single day, the total energy is < 200 kWh/year—less than the annual consumption of a single U.S. household.
- Massive relative savings
- Compared to Bitcoin’s ~707 kWh per transaction, OTR PoW is over 5 million × more energy-efficient per proof.
- Compared to Ethereum’s ~62 kWh per transaction, OTR PoW is over 440 million × more efficient network-wide (for the 1 M msgs/day scenario).
- No specialized hardware needed
- OTR PoW runs on your phone’s existing CPU—no ASIC farms, no GPU clusters—so you’re not driving new silicon purchases or data-center cooling.
Why OTR PoW Can Stay Lightweight
- Adaptive difficulty: Each proof’s work target is tuned so that a modern smartphone or laptop can solve it in a fraction of a second.
- Minimal proof size: Only a tiny nonce and timestamp are stored, avoiding large block headers or merkle trees.
- Single-use context: Proofs are tied to messages, not full blocks—no need to propagate megabytes of ledger state.
By keeping PoW in Offgrid Messenger lightweight and single-purpose, you get the sybil-resistance benefits of proof-of-work without the environmental downsides of large public blockchains.
| Network / Protocol | Energy per Tx/Proof | Relative to OTR PoW |
|---|---|---|
| OTR PoW (Offgrid) | 0.00014 Wh | 1× |
| Solana (PoH) | 0.00803 Wh | ~57× Solana Climate Dashboard |
| IOTA (Tangle) | 0.11 Wh | ~785× Adan |
- OTR PoW runs in ≈0.25 s on a mobile CPU at 2 W → 0.00014 Wh per proof.
- Solana clocks in at about 0.00803 Wh per transaction thanks to Proof-of-History Solana Climate Dashboard.
- IOTA’s DAG-based Tangle uses roughly 0.11 Wh per transaction Adan.
Takeaways
- Even compared to ultra-efficient, low-energy networks, OTR PoW is tens to hundreds of times more frugal.
- No specialized hardware or data-center resources are required—just your phone’s existing CPU.
- The negligible per-proof cost means Offgrid can scale to millions of daily messages with under 200 kWh/year total, versus blockchains that consume orders of magnitude more.