sing-box/docs/features.md

Server

Feature	v2ray-core	clash
Direct inbound	✔	X
SOCKS4a inbound	✔	X
Mixed (http/socks) inbound	X	✔
Shadowsocks AEAD 2022 single-user/multi-user/relay inbound	X	X
VMess/Trojan inbound	✔	X
Naive/Hysteria inbound	X	X
Resolve incoming domain names using custom policy	X	X
Set system proxy on Windows/Linux/macOS/Android	X	X
TLS certificate auto reload	X	X
TLS ACME certificate issuer	X	X

Client

Feature	v2ray-core	clash
Set upstream client (proxy chain)	TCP only, and has poor performance	TCP only
Bind to network interface	Linux only	✔
Custom dns strategy for resolving server address	X	X
Fast fallback (RFC 6555) support for connect to server	X	X
SOCKS4/4a outbound	added by me	X
Shadowsocks AEAD 2022 outbound	X	X
Shadowsocks UDP over TCP	X	X
Multiplex (smux/yamux)	mux.cool	X
Tor/WireGuard/Hysteria outbound	X	X
Selector outbound and Clash API	X	✔

Sniffing

Protocol	v2ray-core	clash-premium
HTTP Host	✔	X
QUIC ClientHello	added by me	added by me
STUN	X	X

Feature	v2ray-core	clash-premium
For routing only	added by me	X
No performance impact (like TCP splice)	no general splice support	X
Set separately for each server	✔	X

Routing

Feature	v2ray-core	clash-premium
Auto detect interface	X	tun only
Set default interface name	X	tun only
Set default firewall mark	X	X

Routing Rule

Rule	v2ray-core	clash
Inbound	✔	X
IP Version	X	X
User from inbound	vmess and shadowsocks only	X
Sniffed protocol	✔	X
GeoSite	✔	X
Process name	X	✔
Android package name	X	X
Linux user/user id	X	X
Invert rule	X	X
Logical rule	X	X

DNS

Feature	v2ray-core	clash
DNS proxy	A/AAAA only	✔
DNS cache	A/AAAA only	X
DNS routing	X	X
DNS Over QUIC	✔	X
DNS Over HTTP3	X	X
Fake dns response with custom code	X	X

Tun

Feature	clash-premium
Full IPv6 support	X
Auto route on Linux/Windows/macOS/Android	✔
Embed windows driver	X
Custom address/mtu	X
Limit uid (Linux) in routing	X
Limit android user in routing	X
Limit android package in routing	X

Memory usage

GeoSite code	sing-box	v2ray-core
cn	17.8M	140.3M
cn (Loyalsoldier)	74.3M	246.7M

Benchmark

Shadowsocks

/	none	aes-128-gcm	2022-blake3-aes-128-gcm
v2ray-core (5.0.7)	13.0 Gbps	5.02 Gbps	/
shadowsocks-rust (v1.15.0-alpha.5)	10.7 Gbps	/	9.36 Gbps
sing-box	29.0 Gbps	/	11.8 Gbps

VMess

/	TCP	HTTP	H2 TLS	WebSocket TLS	gRPC TLS
v2ray-core (5.1.0)	7.86 GBps	2.86 Gbps	1.83 Gbps	2.36 Gbps	2.43 Gbps
sing-box	7.96 Gbps	8.09 Gbps	6.11 Gbps	8.02 Gbps	6.35 Gbps

License

/	License
sing-box	GPLv3 or later (Full open-source)
v2ray-core	MIT (Full open-source)
clash	GPLv3