How many Ethereum-based tokens are there?

Question

(Possibly a little off-topic, but along the lines of previous questions like "How many nodes are supporting Ethereum Classic?" and "How many pre-sale addresses are there?", perhaps... )

The question "Naming conventions for ERC-20 instancies" got me wondering:

How many Ethereum-based tokens are there, and how does this compare to the number of tokens on other platforms?

Clarifications:

• Public, main (ETH) network only;
• I'm not counting ETH as a token itself, though strictly you could argue it is;
• ERC-20/ERC-223 or otherwise;
• By "other platforms" I mean other, non-interoperable, blockchains;
• I'm loosely defining "tokens" on other platforms, be they backed by smart contracts or otherwise. (...Which now has me questioning: "What is a token...?")

Answer 1

From Etherscan it says:

There are a total of 17724 Erc20 Token Contracts

Which would be all the tokens that follow the Ethereum ERC20 Token Standard Interface. I counted all the tokens on CoinMarketCap that are built on Ethereum and there is 324 (Source).

You can also see with this chart the amount of assets built on each platform, taken from this article: How Ethereum became the platform of choice for ICO’d digital assets

Answer 2

As per the discussion in one of the other answers, in lieu of a better way to weed out all those published contracts that are scams or have never been used, or for some other reason aren't worth considering, I've used CoinMarketCap as the arbiter of quality.

Take with numerous pinches of salt, but gives an idea of the ecosystem. (Which I think is what I was getting at when I asked my fuzzy question.)

Results:

Total token count:        409       
-----------------------------
Ethereum                  324
Waves                      26
Omni                       13
BitShares                  11
Nxt                         9
Counterparty                9
Burst                       7
Ethereum Classic            2
NEO                         2
Qtum                        2
Ubiq                        2
NEM                         1
NuBits                      1

Script (there's probably a better way to do this... ):

#!/usr/bin/env python

import urllib
from bs4 import BeautifulSoup
import operator

page = urllib.urlopen("https://coinmarketcap.com/tokens/views/all/")
soup = BeautifulSoup(page.read())

token_dict = {}
token_count = 0

for token in soup.find_all('td', { 'class' : 'platform-name' }):
    token_count += 1
    if token.a.get_text() in token_dict:
        token_dict[token.a.get_text()] += 1
    else:
        token_dict[token.a.get_text()] = 1

# Sort the dictionary, which creates a list of sorted tuples.
sorted_dict = sorted(token_dict.items(),
                     key = operator.itemgetter(1),
                     reverse = True)

print("\n{0:25} {1:10}".format("Total token count:", str(token_count)))
print("-----------------------------")
for i in sorted_dict:
    print("{0:18} {1:10}".format(i[0], i[1]))

Answer 3

As of November 28, 2017 there are about 17724 Tokens. Take a look at all the token here

On Ethereum classic its merely just 7 Tokens. Take a look at them here

IMHO, The number of tokens on Ethereum will always be the highest. Also, the rate at which tokens increase on ethereum is also the highest when compared to any other platform.